There is an old English1, "Early to bed and early to2makes people healthy, wealthy and wise." Sleeping is very3to children. They must have at least eight4sleep every night, or they can't do well in class. And they can't understand or memorize(记住) new things5.

6is good for their bodies. Children must take regular exercise like running, dancing, swimming and7ball games. Exercise8the body strong. Exercise also helps people feel relaxed and9. Children will learn quickly in a good mood. Exercise helps them10better!