阅读理解 阅读下列短文.从每题所给四个选项中.选出最佳选项． Many experiments have been done to see what happe

阅读理解

阅读下列短文，从每题所给四个选项(A，B，C和D)中，选出最佳选项．

Many experiments have been done to see what happens to people if they aren't allowed to naturally follow the sleep cycle (循环). In the experiments people are functional(起作用) normally if they aren't allowed to dream. They are woken as soon as they enter the active part of the sleep cycle where dreaming takes place. They are tested to decide how this has effects on them.

In many experiments, the people being tested went to sleep. As soon as their eyes began to move, a sign that dreaming had begun, they were awakened(唤醒). Two important changes took place in people. They became very nervous and easily to get angry if they weren't allowed to dream. And, the more often they were awakened, the more often they tried to dream. In other words, the length of the passive(消极的) part of the sleep cycle became shorter and shorter. The researchers came to the conclusion that dreaming was caused by some chemical in the brain and that the brain produced the chemical for dreaming to take place. The fact that people tried to dream more if they weren't allowed to dream naturally led us to believe that we need to dream in order to be in balance.

1．Scientists have done many experiments to see ________.

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A．whether or not people dream in their sleep

B．how many dreams a person has in his or her sleep

C．whether people can act normally if they aren't allowed to dream in their sleep

D．what kind of people dream in their sleep

2．When one is asleep, the movement of his eyes shows that ________.

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A．he is going to sleep

B．he is going to awake

C．he begins to dream

D．he is dreaming something interesting

3．One becomes ________ if he is not allowed to dream in his sleep.

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A．nervous and easily to get angryB．happy and delightedC．upset and fearfulD．slow and sad

试题答案

答案：C;C;A

解析：

1．C 导解：从第一句话可知． 2．C 导解：从第二段中的第二句话可知． 3．A 导解：从第三段中的第四句话可知．