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t know for sure. Some scientists think we sleep in order to replenish (補(bǔ)充 ) brain cells. Other scientists think that sleep helps the body to grow and to relieve stress. Whatever the reason, we know that it is important to get enough sleep. 16. Randy Gardner studied the effects of oversleeping. A. Right B. Wrong C. Not mentioned 17 During the experiment, Gardner slept for two hours every night. A. Right B. Wrong C. Not mentioned 18. During the experiment, Gardner had trouble speaking clearly. A. Right B. Wrong C. Not mentioned 19. It took four days for Gardner to recover from the effects 9f the experiment. 請點擊右上角的分享按鈕與好友共享 唯一交流 1294383109 A. Right B. Wrong C. Not mentioned 20. Going without sleep is not dangerous for white rats. A Right B. Wrong C. Not mentioned 21. Scientists are not sure why we need sleep. A Right B. Wrong C. Not mentioned 22. People sleep less than they used to. A. Right B. Wrong C. Not mentioned 。t remember what he was doing. When Gardner finally went to bed, he slept for 14 hours and 45 minutes The second night h