It's nearly seven o'clock . Jack be here at any moment . A. must B. need C. should D. can 题目和参考答案——青夏教育精英家教网—

题目内容

It's nearly seven o'clock . Jack _____ be here at any moment .

A. must B. need C. should D. can

解析:

根据语境空白处应填表示具有"随时可能"意义的情态动词。虽然can可以表示可能性，但它往往表示的是对这种可能性的怀疑。例如：Can he still be alive after all these years ? (这么多年之后，他还可能活在人世吗？) should除具有"应该"词义之外，还有一个含义是：will probably (将来很可能发生)又如：His uncle is working among the enemy officials now . Dangerous things should happen to him at any time . (他的叔叔现在在敌人的军营中工作，危险的事随时都可能发生在他身上。)

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As much as nine hours of sleep a night, in fact. Furthermore, teens’ circadian rhythms (i.e., processes that occur once a day) mean that young people would rather stay up past midnight and rise after 9 a.m. The result? Many teens stay up late, drag themselves out of bed early for school and try to make up the sleep debt on the weekends---or in class!

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Teens need extra sleep for several reasons. First, their brains are changing. “The brain is reorganizing itself, laying down new pathways. What we’re seeing is a relationship between brain redevelopment and an increased need for sleep,” says Kutcher. As well, growth hormones are released during sleep, so adequate sleep is crucial for adolescents’ physical development. In addition, everything adolescents have learned in school that day is being processed and locked into long-term memory during sleep. Sufficient sleep also plays a key role in overall physical health. The immune system, for example, needs deep sleep to become and remain robust(healthy).

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1.The word “zzzs” (Paragraph 1) most probably means __________.

A．food B．sleep C．energy D．blame

2.What causes teenagers to be less sleepy late at night and more sleepy early in the morning?

A．Caffeinated drinks.

B．Too much family activities.

C．Circadian rhythms.

D．Too much homework.

3.How many reason why teens need extra sleep are mentioned in Paragraph 4?

A．Three. B．Four. C．Five. D．Six.

4.One of the reasons why many teenagers fail to have better performances in class is that __________.

A．teenagers go to bed early and sleep late

B．teenagers stay up late and get up late

C．teenagers participate in too many social activities at night

D．teenagers skip breakfast because of sleeping in

5.The author wrote this article to __________.

A．advise parents to let sleeping teenagers lie

B．explain why teenagers often sleep late

C．state schools should start late in the day

D．warn teenagers not to drink coffee before bed

A well-dressed man came into a famous jeweler shop. He explained that he wished to buy a pearl (珍珠) for his wife's birthday and that the price didn't matter since business had been very good for him that year. After examining a number of beautiful and valuable pearls, he chose a nice black one that cost $ 5,000. He paid for the pearl, shook hands with the jeweler and left.

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The rich man asked the jeweler to advertise(登广告) in the newspapers, and offered $25,000 for the matching pearl. Many people answered the ad(广告), but nobody had a pearl that was just right. Just when the jeweler had given up hope, a little old lady came in. To his surprise, she pulled the wonderful pearl from her handbag. "I don't like to sell it," she said sadly. "I inherited(继承) it from my mother, and my mother inherited from hers. But now I really need the money. "

The jeweler was quick to pay her before she changed her mind. Then he called the rich man’s hotel to tell him the good news. The rich man, however, was nowhere to be found.

44. From the first paragraph we can guess that the jeweler considered the well-dressed man as_____________.

A. an honest jeweler to make friends with B. a clever cheat (骗子) with a 1ol

C. a rich businessman and good husband D. a poor gentleman who spent mc

45. He paid$ 5,000 for the pearl without bargaining(讨价还价)______________.

A. because he loved his wife very much

B. in order to get it as quickly as possible

C. since his business had been successful

D. so as to make the jeweler believe him

46. Which of the following is true?

A. The people who answered the ad wanted to sell their pearls at a high price.

B. The woman was the well-dressed man's wife.

C. The jeweler was lucky enough to buy the little old lady's pearl.

D. The rich man didn't know the little old lady.

47. The jeweler could not find the rich man anywhere because he__________.

A. had moved to another hotel B. was busy doing business with others

C. had escaped with $ 20,000 D. had told the wrong telephone number

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