No one knows why we sleep,but it’s certain that we need to.People who are prevented from sleeping begin to suffer obvious effects after a few days—they think less clearly,and they fall asleep during the working hours;some may have hallucinations(幻觉).

There are no rules about sleep.Generally speaking,grown-ups sleep about 7 and half hours each night and probably more than 60 percent get between seven and eight hours.But perhaps eight percent are quite happy with 5 hours or lees,and four percent or so find that they want ten hours or more.If you feel all right,you’re probably getting enough sleep.The important thing is not to worry how much other people get—their needs may be different.Exercise doesn’t seem to need to increase the sleep time—office workers,for example,sleep for about as long as people doing physically active work.

Children sleep more than grown-ups---perhaps 14 to 18 hours soon after birth,going down to grow-up levels by early teenage.Sleep patterns also tend to be different in the elderly,who may sleep less at night than they did when younger,find sleep getting more broken,and often make it a rule to sleep during the daytime.

1.According to the passage,some people are unable to think clearly because .

A. they have hallucinations B. they feel sleepy during the working hours

C. they don’t have enough sleep D. they are certain to be kept from going to bed

2.Which of the following is true?

A. All grown-ups must have at least eight-hour sleep B. Most of grown-ups sleep for seven or eight hours

C. Quite a few people need only 5 hours or less for them sleep D. No grown-ups sleep more than ten hours

3.Whether you have got enough steep is judged by .

A. how may hours you have slept B. How may hours you need to sleep

C. Whether you do exercise and physical work D. Whether you feel fresh and energetic

4.According to the passage a boy of 14 years old sleeps .

A. as long hours as a grown-up B. much longer hours than grown-up

C. for 14 hours each night D. for less than 8 hours per night

The other day I was offered two tickets to a special preview of the latest movie for free. I wasn't interested, _______I knew my two boys would be.

That evening, we were a bit _______ for time. So instead of having dinner at home, we had fast food near the movie theater Oscar. There went the _______ of eight movie tickets.

Then I met up with a friend and we sat around _______ for a while, and another movie ticket went into a cup of coffee. After that, we figured we might as well _________ around until the movie ended to pick up the boys. To help _______ the time, I bought snacks. However, the _______ went for an hour longer than expected. To watch the free movie, we always have to _______ an hour of ads.

Oh, did I _______ parking and fighting my way through the ________ to get to the right theater? I could have sent the __________to a movie theater in walking distance and had enough ________ left over to watch ten more movies!

Next time I'm offered something free, I’ll ________ refuse it.

I should have known better. ________ in 2004, I built my own business. One of my marketing strategies is that I often offer free gifts. I said “probably” because "free" is just the most irresistible __________ in your marketing language. And it always ________.

If you don’t believe me, next time when you do a promotion, ________ this test: one with and one without the free ________. You will be amazed by how many people will ________ hundreds of dollars to get something for _________

1.A. for B. or C. so D. but

2.A. grateful B. prepared C. rushed D. thankful

3.A. time B. price C. chance D. length

4.A. singing B. judging C. bargaining D. chatting

5.A. wander B. turn C. look D. gather

6.A. save B. waste C. record D. kill

7.A. meeting B. movie C. walk D. coffee

8.A. break down B. sit through C. cut down D. look through

9.A. forget B. continue C. mention D. stop

10.A. race B. park C. gate D. traffic

11.A. employees B. customers C. boys D. friends

12.A. food B. patience C. room D. money

13.A. probably B. angrily C. definitely D. repeatedly

14.A. Ending B. Writing C. Reporting D. Starting

15.A. word B. reason C. letter D. desire

16.A. fails B. cheats C. works D. loses

17.A. try B. study C. face D. attend

18.A. help B. gift C. advice D. market

19.A. gain B. bank C. receive D. pay

20.A. something B. everything C. nothing D. anything

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