单项选择题

Questions 19 and 21 are based on the passage you have just heard.

A．To improve transportation in the countryside.
B．To move troops quickly from place to place.
C．To enable people to travel at a higher speed.
D．To speed up the transportation of goods.

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Questions 16 to 18 are based on the passage you have just heard.

A．To investigate how being overweight impacts, on health.
B．To find out which physical drive is the most powerful.
C．To discover what most mice like to eat.
D．To determine what feelings mice have.

单项选择题

Questions 16 to 18 are based on the passage you have just heard.

A．When they are hungry.
B．When they smell food.
C．When they are thirsty.
D．When they want company.

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Questions 16 to 18 are based on the passage you have just heard.

A．They search for food in groups.
B．They are overweight when food is plenty.
C．They prefer to be with other mice.
D．They enjoy the company of other animals.

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Questions 19 and 21 are based on the passage you have just heard.

A．19Its construction started before World War I.
B．Its construction cost more than $40 billion.
C．It is efficiently used for transport.
D．It is one of the best in the world.

单项选择题

Questions 19 and 21 are based on the passage you have just heard.

A．To improve transportation in the countryside.
B．To move troops quickly from place to place.
C．To enable people to travel at a higher speed.
D．To speed up the transportation of goods.

单项选择题

Questions 19 and 21 are based on the passage you have just heard.

A．In the 1970s.
B．In the 1950s.
C．In the 1960s.
D．In the 1940s.

单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A．Chatting while driving.
B．Messaging while driving.
C．Driving under age.
D．Speeding on highways.

单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A．A gadget to hold a phone on the steering wheel.
B．A gadget to charge the phone in a car.
C．A device to control the speed of a vehicle.
D．A device to ensure people drive with both hands.

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Questions 22 to 25 are based on the passage you have just heard.

A．The car keeps flashing its headlights.
B．The car slows down gradually to a halt.
C．They are alerted with a light and a sound.
D．They get a warning on their smart phone.

单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A．Installing a camera.
B．Checking their emails.
C．Using a connected app.
D．Keeping a daily record.