题目内容

How do most migrating animals travel？

A. They travel together in large numbers.
B. They travel independently.
C. They travel on daytime.
D. They travel with those who have made the journey before.

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What is the passage mainly about？

A. How animals sense the time.
B. How animals find their way in migration.
C. Why animals like to travel in groups.
D. How scientists find the secret of birds.

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Task 2
Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45.
When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important that they should be able to find their way accurately.
Birds find their way by the stars at night and by the sun during the day. People thought that this was impossible. Then some scientists made an experiment. They put some migrating birds(候鸟)in cages inside a planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the birds began to fly to the sides of the cage. Every time he moved it, the birds moved to a new position. Scientists discovered that they always flew toward the direction in which they would have flown if the sky had been real. This proved that they could see the stars and respond to them.
Many animals, especially birds, have a very precise sense of time, which is called their “internal clock”. In cloudy weather, birds delay setting off on long journeys, but if the cloud lasts for a long time, they must go at last, to complete their migration in time. In such conditions, they are able to steer(引导)by following the magnetic field(磁场)of the earth. We could say that they have their own special compass inside them, which tells the right direction to go.
Most migrating animals travel in groups, sometimes in very large numbers. This makes it more likely that they will find the right way, especially when the group has experienced animals which have made the journey before.
What was proved by the experiment mentioned in the passage？

A. Birds find their way by the stars at night and by the sun during the day.
Birds can tell the differences between real sky and artificial sky.
C. Birds can see the stars and would move when the stars change position.
D. Birds always fly to the sides of the cage.

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A．She is going to meet her friend.B．She is going to expecting her friend.C．She is going

A. She is going to meet her friend.
B. She is going to expecting her friend.
C. She is going to take part in a party with her friend.
D. She is going to take part in a party with the man.

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The phrase “internal clock” means ______ .

A. a clock that is built inside the bird
B. a clock that tells correct time
C. an exact sense of direction
D. an accurate sense of time

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How do most migrating animals travel？

A. They travel together in large numbers. B. They travel independently. C. They travel on daytime. D. They travel with those who have made the journey before.

What is the passage mainly about？

A．She is going to meet her friend.B．She is going to expecting her friend.C．She is going

The phrase “internal clock” means ______ .

A. They travel together in large numbers.
B. They travel independently.
C. They travel on daytime.
D. They travel with those who have made the journey before.