阅读理解：
After a day of work and play, the body needs to rest. Enough 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 another.
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 that you breathe very deeply. Other people believe that drinking warm milk will help make you drowsy. There is also an old suggestion that counting sheep will help you fall asleep!
问题：
1.A good title for this passage is .
A.SleepB.Good HealthC.DreamsD.Work and Rest
【参考答案】A
[考点]主旨大意题
【精析】A 第一段讲述了充足睡眠的好处及作用，接着概述了睡眠的四个等级以及做梦时眼睛的一些动作;最后一段提供了一些有助于睡眠的方法。整篇文章都与睡眠有关，因此，文章的题目应是“Sleep”。故选A。
2. The word “drowsy” in the last paragraph means .
A.sick
B.awake
C.excited
D.sleepy
【参考答案】D
[考点]词语理解题
【精析】D 最后一段讲述的是有助于睡眠的方法。根据最后一段最后一句“…will help you fall asleep!”可推知，drowsy是fall asleep的近义词。sick：生病的，病态的;awake：醒着的;excited：兴奋的;sleepy：困倦的，昏昏欲睡的。根据最后一段第二句“其他人认为喝热牛奶将有助于使你困倦”可知，选D。
3. This passage suggests that not getting enough sleep might cause you to .
A.dream much often
B.have poor health
C.feel too nervous
D.breathe very deeply
【参考答案】B
[考点]推理判断题
【精析】B 根据第一段第二句“Enough sleep is necessary for good health.”可知，充足的睡眠对健康很有必要。由此可推知，睡眠不足可能会导致身体状况变糟糕。故选B。文章并未提及A、C两项，D项是有助于睡眠的方法。
4. According to the passage, during REM, .
A.your eyeballs move quicklyB.you dreamC.you are restlessD.both A and B
【参考答案】D
[考点]事实细节题
【精析】D 根据第三段第二、三句“…when dreaming occurs, your eyeballs begin to move more quickly…This stage of sleep is called REM…”可知，当人们做梦时，眼球开始快速转动，这个过程叫作REM，所以选项A、B都正确。故选D。
5.The average number of hours of sleep that an adult needs is .
A.approximately six hours
B.around ten hours
C.about eight hours
D.not stated in the passage
【参考答案】D
[考点]推理判断题
【精析】D 第一段讲述了充足睡眠的好处，第二段概述了睡眠的四个等级，第三段讲述了做梦时眼睛的一些动作，最后一段给出了一些有助于睡眠的方法。但是文章并没有说明成年人所需的平均睡眠时间。故选D。
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