1. (2016六上·罗湖期中) 根据短文内容, 回答下面的问题。

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    “Early to bed, early to rise.” makes a marl healthy, wealthy and wise. It's good for the body.

    This is an old saying. Have you heard of it before? It means that we must go to bed early at night and get up early in the morning. If we do, then we shall be healthy, we shall also be rich and clever.

    That is true. The body must have enough sleep to be healthy. Children of young age should have enough sleep, or they can't do their work very well. They will not be wise and they may not become wealthy!

    The body also needs exercise: walking, running, jumping, swimming, playing games and some other exercise. Exercise keeps the body strong. Exercise also helps the blood to move around inside the body. This is very important. Our blood takes food to all of our body. The head also needs blood. Exercise parts helps us to think better.

1. （1） According(根据) to this passage(文章), what will happen if children don't have enough sleep?
   

3. （2） If we want to keep healthy, what exercise should we do? Please give 3 examples(举例).

5. （3） “Early to bed, early to rise. ”can help you healthy, rich and clever.

7. （4） Exercise can help our body to be stronger and think better.