Everyone must go to bed early and get up early, or we won’t be healthy and clever.Is this true? Maybe it is.The body must have enough sleep.Children of your age need ten hours’sleep every day.If you don’t go to bed early, you won’t have enough sleep .Then you can’t think properly and can’t do your work properly.You will not be clever.Some people go to bed late and get up late.This is not good for them.We must go to bed at night when it is dark.The dark helps us to sleep soundly.When the daytime es, we must get up.This is the time for exercise.If you lack exercise, you will bee weak.Exercise keeps a strong body.Exercise helps the blood（血液）flow（流动）around inside the body.This is very important.Blood takes food to all parts of our body.The brain also needs blood, we think with our blood.If we keep our body healthy and take exercise, we can think better.
【小题1】If we want to be healthy and clever, we must go to bed .A．late and get up earlyB．early and get up lateC．early and get up earlyD．late and get up late【小题2】Children of your age need A．ten hours’ sleepB．nine hours’ sleepC．twelve hours’ sleepD．eight hours’ sleep【小题3】The best time to sleep is when .A．daytimesB．it is darkC．we are taking exercisesD．it is late afternoon【小题4】Exercise makes the body A．weakB．cleverC．healthD．strong【小题5】Exercise A．makes more bloodB．helps the blood to flowC．makes food for our bloodD．makes our brain tiredC
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(答案→)C
解析：这篇短文主要介绍了睡眠对我们健康的影响，作者并就此提出了自己的建议。
【小题1】根据Everyone must go to bed early and get up early, or we won’t be healthy and clever.描述可知选C。
【小题2】根据Children of your age need ten hours’sleep every day.描述可知选A。
【小题3】根据We must go to bed at night when it is dark.描述可知选B。
【小题4】根据If you lack exercise, you will bee weak.如果你不锻炼，你就会变得虚弱。可知选D，锻炼让我们强壮。
【小题5】根据Exercise helps the blood（血液）flow（流动）around inside the body.描述而可知选B。