题目内容：

    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 moves 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 say 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 B.Dreams

C.Good Health D.Work and Rest

2.The word drowsy in the last paragraph means ____.

A.sick B.a little sleepy

C.stand up D.lie down

3.During REM, ____.

A.you are restless B.you never dream

C.your eyes move quickly D.your eyes are moving fast before dreaming

4.The average number of hours of sleep that an adult needs is ______ .

A.about six hours B.around ten hours

C.about eight hours D.not described here