A. the cause of weboholism

　　B. the advantage of weboholism

　　C. the popularity of weboholism

　　D. the influence of weboholism

　　6. We can learn from the passage that ________.

　　A. weboholism has the greatest effect on teenagers

　　B. teenagers can hardly balance real and virtual life

　　C. people are addicted to games on the lnternet

　　D. virtual life is more vivid and attractive anyway

　　7. Which of the following is NOT true of weboholism?

　　A. It contributes to the development of the web.

　　B. The chat room language may change social culture.

　　C. The problem will have a negative influence on our future.

　　D. People addicted to the web often become inactive in real life.

　　8. The author’s attitude towards weboholism is that of being _______.        

　　A. objective

　　B. positive

　　C. opposed

　　D. acceptable

　　C

　　Nap，doze，shut-eye and snooze are all expressions we use to describe that mysterious state，sleep. We all do it，we can't get by without it and by the time we reach old age，most of us have spent 20 years sleeping. Yet，nobody knows why we do it．

　　Most scientists think that by resting our bodies，we allow time for essential maintenance（维护）work to be done. Any damage that there is can be put right more quickly if energy isn't being used up doing other things. Injured animals certainly spend more time asleep than usual while their wounds are healing（愈合）．And quite a few illnesses make us feel sleepy so our body can get on with curing us．

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