3. 　 

　　Is this true? Perhaps it is. The body must have enough sleep. Children of your age need ten hours’ sleep every night. If you do not go to bed early, you cannot have enough sleep. Then you cannot think properly and you cannot do your work properly. You’ll not be wise and you may not become wealthy!

　　4. 　 

　　Some people go to bed late at night and get up late in the morning. This is not good for them. We must sleep at night when it is dark. The dark helps us to sleep properly. When daylight comes, we must get up. This is the time for exercise. Exercise means doing things with the body. Walking, running, jumping, swimming, playing games are all exercise. If the body is not used, it becomes weak. Exercise keeps it strong.

　　5. 　 

　　Exercise helps the blood to move around inside the body. This is very important. Blood takes food to all parts of our bodies. The brain in our heads also needs blood. We think with our brains. If we keep our bodies healthy and take exercise, we can think well.

　　【语篇随练】

　　1. 根据阅读理解翻译下列句子

　　The satellite separated from the rocket 26 minutes after its launch and was then successfully delivered into a geostationary transfer orbit.

　　2. 用30个词左右概括阅读理解大意

　　答案解析

　　Ⅰ. 1.【解析】选B。打破prevent. . . from doing. . . 的思维定势, 此处为带逻辑主语的不定式作目的状语。句意:为了我们能幸福地生活, 必须采取措施制止污染。

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