单项选择题

A．A piece of jewellery that you wear on your finger.
B．An object in the shape of a circle.
C．The sound made by a bell or the act of making this sound.
D．A small square area surrounded by ropes, where people box or wrestle.

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单项选择题

A．800,000.
B．1 million.
C．250 million.
D．200 million.

单项选择题

A．A piece of jewellery that you wear on your finger.
B．An object in the shape of a circle.
C．The sound made by a bell or the act of making this sound.
D．A small square area surrounded by ropes, where people box or wrestle.

单项选择题

A．Jump more than a few feet into the air.
B．Jump only a few feet into the air.
C．Jump in a curve for a few feet.
D．Jump in a curve for more than a few feet.

单项选择题

A．To examine the chemical elements in the Ice Age.
B．To look into the pattern of solar wind activity.
C．To analyze the composition of different trees.
D．To find out the origin of carbon-14 on Earth.

单项选择题

A．Disease.
B．Food shortage.
C．Wars.
D．All of the above.

单项选择题

A．In a straight line.
B．In a curved line.
C．A long distance before it fell back to the ground.
D．A short distance before it fell back to the ground.

单项选择题

A．A gradual increase.
B．A sharp increase.
C．A gradual decrease.
D．A sudden decrease.

单项选择题

A．He has no rocket engine in his hands.
B．He could not throw it fast enough.
C．He could not make the ball small enough.
D．He could not throw the ball in a straight line.

单项选择题

A．The lifecycle of trees.
B．The number of trees.
C．The intensity of solar burning.
D．The quality of air.

单项选择题

A．500 million.
B．250 million.
C．5 billion.
D．6 billion.

单项选择题

A．When it is small enough.
B．When it is fast enough.
C．When it is big enough.
D．When it is slow enough.

单项选择题

A．It affects the growth of trees.
B．It has been increasing since the Ice Age.
C．It is determined by the chemicals in the air.
D．It follows a certain cycle.

单项选择题

A．They are bigger.
B．They have more services.
C．They always have flat roofs.
D．Each flat has its own car park.

单项选择题

A．Many people live in them.
B．They are weak-planned.
C．They have everything that people need.
D．They have central heating and air-conditioning systems.

单项选择题

A．It is a cheap way of building.
B．The space is useful for parking cars.
C．The space is needed for cinemas, clubs and churches.
D．Flat roofs can be used for drying washing.

单项选择题

A．New blocks of flats.
B．Old blocks of flats.
C．Flats now and then.
D．Residence and people.

单项选择题

A．Miller was loved by her parents.
B．Miller was loved by her sisters.
C．Miller was loved by her brothers.
D．Miller enjoyed a happy life as a child.

单项选择题

A．Maths.
B．Painting.
C．Both A and Ｂ.
D．Neither A nor Ｂ.

单项选择题

A．When looking for jobs.
B．In primary school.
C．In high school.
D．In college.

单项选择题

A．A physician.
B．A physicist.
C．A journalist.
D．Unemployed.