5.  It is possible to_____ _ (繁殖)these bacteria in the laboratory.

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3. The school board is made up of parents who    to make decisions about

school affairs.

A. had been elected       B.  had elected

C.  have been elected     D. have elected

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11. You will be successful in the interview    you have confidence.

A. before      B. once

C. until      D. though

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 8. Mr Black is willing to do       Mrs Black tells him to do.

A. whichever  B. however

C. whatever  D. whenever

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15.  Shanghai is the first city in the world     a high-speed maglev train, from the city to Pudong Airport.

A. building     B.  having built

C. to have built   D. built

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10. She is u_______ her mother; she is tall and her mother is very short.

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根據(jù)括號內(nèi)的提示完成句子

1.  最讓我們失望的是，導(dǎo)游總是讓我們離開我們認(rèn)為非常有趣的東西。

__________________________  was that the guide was always asking us to leave what we thought very interesting, (what弓|導(dǎo)的主語從句)

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9. It still puzzles the science world why some mammals produce their young by________ (lay) eggs and hatching while others by______ (give) birth to young babies.

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7. While intelligent people can often     the complex, a fool is more likely to complicate the simple.

A. simplify     B. sacrifice

C. substitute      D. survive

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