起作用，生效________

汉英翻译

起作用，生效________

书面表达

根据下列提示，以Water为题写一篇100词左右的文章：

(1) 水在我们的生活中起着很重要的作用。

(2) 但水的浪费和缺乏危及着为人类的生存。

(3) 怎样合理利用水资源，政府已采取有效措施。

(4) 珍惜水就是珍惜生命。

(5) 参考词汇：珍惜value

　　　　　　起作用play a part

　　　　　　采取措施take measures

　　　　　　资源resource

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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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