10.
阅读理解
Do
you get enough sleep? With so much homework
it's often difficult to get the rest you need. But you need to try, because
sleep keeps you healthy and it stops you getting fat.
Recently, a group of U. S. scientists did a study of
kids aged between 8 and 13. The study found that if kids sleep for just one
more hour each day, the chance of their getting fat is cut by about 30 percent.
Why?
When people don't get enough sleep, they
become tired. When they are tired, they don't exercise enough. Also, kids like
snacks. If they are awake (醒着的) an
extra hour or two each day, they have more time to eat snacks or other
unhealthy foods.
So,
how much sleep should you get? Scientists
suggest 10 to 11 hours a night for kids aged 5 to 12. For older kids, eight to
nine hours will do.