After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the previous day. The rest that you get while sleeping enables your body to prepare itself for the next day.
　　There are four levels of sleep, each being a little deeper than the one before. As you sleep, your muscles relax little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts back and forth from one level of sleep to the other.
　　Although your mind slows down, from time to time you will dream. Scientists who study sleep state that when dreaming occurs, your eyeballs begin to move more quickly (Although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.
　　If you have trouble falling asleep, some people recommend breathing very deeply. Other people believe that drinking warm milk will help make you drowsy. There is also an old suggestion the counting sheep will put you to sleep!
　　1. A good title for this passage is ____.
　　A. Sleep     
　　C. Dreams
　　B. Good Health    
　　D. Work and Rest
　　2. The word drowsy in the last paragraph means ____.
　　A. sick     
　　C. asleep
　　B. stand up    
　　D. a little sleepy
　　3. This passage suggests that not getting enough sleep might make you _____.
　　A. dream more often  
　　C. nervous    
　　B. have poor health   
　　D. breathe quickly
　　4. During REM, ____.
　　A. your eyes move quickly  
　　C. you are restless
　　B. you dream    
　　D. both A and B
　　5. The average number of hours of sleep that an adult needs is ______ .
　　A. approximately six hours 
　　C. about eight hours 
　　B. around ten hours   
　　D. not stated here   
　　參考答案及解析：
　　1. A。文章的第一段談到睡眠能使身體健康， 第二段、第三段談到睡眠的幾種狀態(tài)，最后一段談到很快入睡的幾種方法。因此整篇文章都圍繞睡眠而談， 因此A為正確答案。 
　　2. D。drowsy :瞌睡的， 想睡的。 因為上一句的意思是：“如果你睡覺有困難的話，有人建議慢慢的深深呼吸。”緊接著作者說：“另外一些人認(rèn)為喝熱牛奶能使你…, 根據(jù)上下文應(yīng)該選“瞌睡的”， 因此只有D 最符合題意。sick : 有病的；stand up :起立。 asleep : 睡著的。
　　3. B。答案在文章的第一段第二句話：“Sleep is necessary for good health.”意思是：“睡眠有利于身體健康。”因此本句的意思是睡眠不足有害健康。只有B最符合題意。
　　4. D。答案在第三段第二句話：“Scientists who study sleep state that when dreaming occurs your eyeballs begin to move more quickly.”意思是：“研究睡眠的科學(xué)家指出一個人做夢的時候眼球移動速度加快。”因此正確答案為D。
　　5.D。文章中沒有談到成年人的平均睡眠時間。
　　I don’t think there is anything wrong with your blood. The key to your problem is that long nap (打盹，小睡) after dinner.