阅读理解。
Do you get enough sleep? With so much homework, it's often difficult to get enough rest. But you
need to try, because sleep keeps you healthy and it stops you getting fat.
Recently a group of US scientists did a study(调查)of kids between 8 and 13. The study found that if
kids sleep for just one extra(额外的)hour each day，the chance of their getting fat is cut by about 30
percent (30% ) .
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 food.
So，how much sleep should you get？Scientists suggest (建议)10 to 11 hours a night for kids from 5
to 12. For older kids , eight to nine hours will do.
1. There are _____reasons people might get fat without enough sleep.
A. 3
B. 2
C. 1
D. none
2. If you are under 10，the scientists advise you to sleep_____ hours.
A. 10 to11
B. 8to9
C. 8 to 13
D. 8 to 11
3. The scientists did the study in ?
A.China
B. Britain
C. America
D. Japan
4. What does"eight to nine hours will do"mean？
A. Eight to nine hours' sleep will be good and enough.
B. Eight to nine hours' sleep will be too long.
C. Eight to nine hours' sleep will help get fat.
D. Eight to nine hours' sleep will help eat snacks and unhealthy foods.
5. What does the passage talk about?
A. How to get long sleep.
B. How to keep fit.
C. Enough sleep makes people healthy and slim(苗条).
D. Long sleep makes people healthy and slim.
