Early to bed, early to rise, makes a man healthy, wealthy and wise. This is an old English saying. It means that we must go to bed early and get up early in the morning. Then we shall be healthy. We shall also be rich and clever.
This is true. The body must have enough sleep to be healthy. Children of young age should have ten hours’ sleep every night. People who do not have enough sleep can’t do their work very well. They won’t be wise and they may not become healthy!
The body also needs exercise. Walking , running , swimming and playing games are all exercise. Exercise keeps the body strong. Exercise also helps the blood （血液）move around inside the body. This is very important. Our blood takes food to all parts of our body. The head also has blood. Exercise helps us think better.
If we get up early and go to bed early, we shall be healthy.
Children of young age shouldn’t have ten hours’ sleep every night.
A person needs exercise because it makes him strong.
Exercise also helps the blood （血液）move around inside the body
Exercise can’t help our head think better.