【C13】_考试资料网

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C1】

A．guard
B．beautify
C．control
D．scan

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C1】

A．supports
B．changes
C．drives
D．spirits

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C2】

A．appear
B．shrink
C．enlarge
D．shift

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C3】

A．model
B．function
C．equipment
D．prototype

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C2】

A．behind
B．to
C．among
D．with

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C4】

A．flat
B．tiny
C．silver
D．big

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C3】

A．poured
B．pumped
C．blown
D．dumped

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C5】

A．invitations
B．diagrams
C．messages
D．signals

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C4】

A．ways
B．areas
C．respects
D．cases

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C6】

A．fraud
B．premium
C．industry
D．coverage

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C5】

A．deteriorated
B．recovered
C．improved
D．injured

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C7】

A．charge
B．compare
C．connect
D．issue

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C6】

A．evidently
B．habitually
C．consciously
D．naturally

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C8】

A．against
B．to
C．of
D．about

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C7】

A．elastic
B．alert
C．awake
D．open

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C9】

A．arresting
B．tracking
C．abusing
D．questioning

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C8】

A．vanishes
B．hides
C．falls
D．ceases

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C10】

A．alone
B．ahead
C．soon
D．above

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C9】

A．develop
B．treat
C．observe
D．prevent

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C11】

A．adjust
B．facilitate
C．monitor
D．design

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C10】

A．measuring
B．emitting
C．inhaling
D．smelling

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C12】

A．spying on
B．searching out
C．looking to
D．asking for

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C13】

A．though
B．while
C．as
D．if

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C11】

A．condensed
B．dispersed
C．generated
D．polluted

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C12】

A．through
B．away
C．off
D．along

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C14】

A．frightened
B．thrilled
C．puzzled
D．hurt

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C13】

A．specialized in
B．guided to
C．controlled over
D．involved in

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C15】

A．special
B．major
C．painful
D．cherished

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C14】

A．flame
B．room
C．candle
D．volunteer

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C16】

A．shy to
B．obliged to
C．entitled to
D．free to

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C15】

A．favorable
B．negative
C．definite
D．impressive

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C17】

A．behind
B．in
C．after
D．under

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C16】

A．although
B．provided
C．therefore
D．because

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C18】

A．hit
B．snapped
C．insulted
D．teased

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C17】

A．prepared for
B．made up for
C．blamed for
D．appreciated for

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C18】

A．potentially
B．periodically
C．instantly
D．permanently

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C19】

A．exciting
B．striking
C．promising
D．alarming

单项选择题

Nowadays, amateur photography has become a troubling issue. Citizens of rich countries have got used to being watched by closed-circuit cameras that【C1】roads and cities. But as cameras【C2】and the cost of storing data decreases rapidly, it is individuals who are taking the pictures. Some 10,000 people are already testing a【C3】of Google Glass. It aims to reproduce all the functions of a smartphone in a device placed on a person"s nose. Its flexible frame holds both a camera and a【C4】screen, and makes it easy for users to take photos, send【C5】and search for things online. Glass may fail, but a wider revolution is under way. In Russia, where insurance【C6】is common, at least 1 million cars already have cameras with them that film the road ahead. Police forces in America are starting to【C7】officers with video cameras, pinned to their uniforms, which record their interactions with the public. Widespread recording can already do a lot of good. Car-cams can help resolve insurance claims and encourage people to drive better. Police-cams can discourage criminals from making groundless complaints【C8】police officers and officers from【C9】the suspects. Optimists see broader benefits【C10】Plenty of people carry activity trackers to【C11】their exercise or sleep patterns; cameras could do the job more effectively, perhaps also【C12】their wearers" diets. "Personal black boxes" might be able to transmit pictures【C13】their owner falls victim to an accident or crime. Not everybody will be【C14】by these prospects. A perfect digital memory would probably be a pain, preserving unhappy events as well as【C15】ones Suspicious spouses and employers might feel【C16】review it. The bigger worry is for those in front of the cameras, not【C17】them. The web is filled with sneaky photos of women,【C18】in public places. Wearable cameras will make such furtive photography easier. The combination of cameras everywhere—in bars, on streets, in offices, on people"s heads—is a powerful and【C19】one. We may not be far from a world【C20】which your movements could be tracked all the time.【C20】

A．on
B．over
C．in
D．from

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C19】

A．odours
B．poisons
C．alcohols
D．scents

单项选择题

A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】the effect The researchers monitored the hearts of 13 men and women as they breathed in air【C3】into a small chamber. In some【C4】the air included smoke from candles in a second room. The volunteers didn"t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】. Everyone"s heart rate varies【C6】all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】and able to regulate the heart But this variation【C8】as we get older and if we【C9】heart problems. In the study, it was increased by【C10】candle smoke. Researcher Christina Isaxon said the concentration of smoke【C11】during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren"t told what they were breathing, the effect could not be explained【C12】by the calming effect of candlelight. Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】regulating the heart"s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】is still. The study did not find any【C15】health effects of the smoke—【C16】she admitted she did not "make a huge effort" to find any. Soot, black powder in the smoke, from lit candles has been【C17】health problems in the past. The American Chemical Society has warned that common wax candles release【C18】harmful chemicals linked to cancer and other illnessea It recommends using beeswax. Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】and dyes as they may give off【C20】chemicals when burned.【C20】

A．enormous
B．fantastic
C．fearful
D．dangerous

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