Try this: for a whole day, forget about the clock. Eat when you’re hungry and sleep when you’re tired. What do you think will happen?
You may be surprised to find that your day is much like most other days. You’ll probably get hungry when you normally eat and tired when you normally sleep. Even though you don’t know what time it is, your body does.
Inside our bodies are several clocklike systems that follow a 24- hour cycle. Everyone is unique, which is why you might like to stay up late while your sister always wants to go to bed early.
Regularly staying up late can make kids do worse on tests and quizzes. And working shifts at night leads to higher rates of heart disease.
“There is a growing sense that when we eat and when we sleep are important parts of how healthy we are,” says Steven Shea, Director of the Sleep Disorders Research Program at Brigham and Women’s Hospital in Boston.
“During the night, we are prepared to sleep,” Shea says. “During the day, we are prepared to eat and move around, If you reverse ( 颠倒) what you are doing, everything is out of phase. That can have adverse consequences.
【小题1】What does the underlined sentence suggest?

Try this: for a whole day, forget about the clock. Eat when you’re hungry and sleep when you’re tired. What do you think will happen?

   You may be surprised to find that your day is much like most other days. You’ll probably get hungry when you normally eat and tired when you normally sleep. Even though you don’t know what time it is, your body does.

   Inside our bodies are several clocklike systems that follow a 24- hour cycle. Everyone is unique, which is why you might like to stay up late while your sister always wants to go to bed early.

   Regularly staying up late can make kids do worse on tests and quizzes. And working shifts at night leads to higher rates of heart disease.

   “There is a growing sense that when we eat and when we sleep are important parts of how healthy we are,” says Steven Shea, Director of the Sleep Disorders Research Program at Brigham and Women’s Hospital in Boston.

   “During the night, we are prepared to sleep,” Shea says. “During the day, we are prepared to eat and move around, If you reverse ( 颠倒) what you are doing, everything is out of phase. That can have adverse consequences.

1.What does the underlined sentence suggest?

A. We don’t need to care about time.      

B. We don’t need the clock.

C. The clock is not useful.               

D. The clock is not remembered.

2.What makes some like to stay up late while others go to bed early?

   A. our bodies      B. our minds      C. the clock       D. our unique system

3.Steven Shea suggests ________.

   A. when we eat, we are prepared to eat.   

B. when we sleep, we are prepared to sleep

   C. when we eat and when we sleep are important parts of how healthy we are

   D. we are prepared to follow clocklike system

4.“Everything is out of phase.” means________.

   A. everything is out of order          

B. everything is bad

   C. everything is good                 

D. everything is not controlled

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 US scientists did a study (调查) of kids aged 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 .

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.

1.How many reasons are given why people might get fat without enough sleep?

A. 3.     B. 2.     C. 1       D. None.

2.If you are under 10， how long do the scientists advice you to sleep?

A. 10 to 11 hours.     B. 8 to 9 hours.   C. 8 to 13 hours. D. As long as possible.

3.Where was the study done by the scientists?

A. In China. B In Britain. C. In America. D. In 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 fat.

C. Enough sleep makes people healthy and slim (苗条)

D. Long sleep makes people healthy and slim.