题目内容：

完形填空

During the day we work and play, and at night we sleep. Our bodies rest while we are     _. In the morning we are ready    _again.Ourbodiesgrow     _ while we are asleep. Children who are tired usually    _sleep. We can get better at our lessons     _we have had plenty of rest. Boys and girls who are eight or nine years old need ten hours of sleep every night. Our bodies need plenty of    _when we sleep. If we do not get enough fresh air, we    _tired when we wake up. While in bed we must not cover our    _. Our lungs(肺) need to get enough fresh air. If we    _our windows at night, we can have plenty of fresh air. Cool air is better than warm air. Boys and girls who want to be     _must get plenty of sleep.

1.A.asleepB. sleepC. restD. play

2.A. to work and play B. working and to playC. to work and playing D. working and playing

3.A. much B. more C. mostD. slow

4.A. can B. may C. need D. must

5.A. while B. before C. as D. after

6.A. airB. sunC. waterD. food

7.A.feltB. will feel C. are feelingD. has felt

8.A. foot B. arm C. headD. body

9.A. open B. close C. draw D. use

10.A. happy B. interestedC. helpful D. healthy