(   ) 4. ―         will he be back?

—In a few days.

   A. How often   B. How long   C. How soon   D. How far

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3. 為了保持健康，人人需要鍛煉，如跑步和做球類運 動等。

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Up to two thirds of children don't get as much sleep as they should do,and this can make them nervous and slower at school,researchers say.

So 16        should young people sleep each night? The answer is between 8 and 10 hours. If you don't get enough sleep at night,you'll have 17        energy the next day.

But the researchers say many children have missed out on 4,500 hours of sleep 18        the time they are 7 years old. They say that children miss sleep because they have TVs and computers in their rooms and 19        parents don't read to their younger children at night any more. The traditional "bedtime story" helps children to relax and fall asleep 20       . Children with TVs and computers in their bedrooms are more likely to sleep badly,and to get less than 8 hours' sleep. Even losing one hour's sleep a night can mean that children do less well at school.

German scientists think that your 21        keeps working while you are asleep. To show that they were 22      ,they gave two groups of people a problem to work out. One group went to sleep and the other group stayed 23       . The result? The people who slept worked out the answer more quick?ly,suggesting that their brains had been trying to 24        the answer while the people were asleep. So,make sure you get enough sleep tonight,25        you'll be at your best tomorrow.

(   ) 16. A. how much   B. how many

   C. how long   D. how often

(   ) 17. A. more   B. less   C. few   D. little

(   ) 18. A. by   B. at   C. on   D. during

(   ) 19. A. proud   B. free   C. poor   D. busy

(   ) 20. A. peacefully   B. carefully

   C. happily   D. sadly

(   ) 21. A. head   B. brain

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(   ) 22. A. perfect   B. bright

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(   ) 23. A. awake   B. alive

   C. asleep   D. absent

(   ) 24. A. think over   B. open up

   C. find out   D. put down

(   ) 25. A. or   B. but   C. if   D. and

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7. They had an argument       (solve) the problem together.

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(   ) 6. [2015 •重慶B ] —When shall we begin our meeting?

— We'll begin it when Helen       .

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(   ) 9. ―Do you take exercise every day?

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   A. spend   B. cost

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4. 開始了解某人         

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9. to start with     

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