Healthy lifestyles

Healthy lifestyles（健康的生活方式）

"Early to bed and early to rise （起床）makes people healthy, wealthy （富有的）and wise（明智的）. "
This is an old English saying（警句，谚语）.
Kids should （应该）have nine or ten hours' sleep every night.
If they sleep well, they will do well in their study.
The body needs exercise（锻炼）.
Walking, running, swimming and playing footbal all exercise.
Exercise helps to keep the body healthy.