单选题：As the sea ice melts sooner each swimmer,polar bears are for..

题目分类：从属连词
题目类型：单选题
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As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season. [ ] A.before
B.unless
C.since
D.until

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If we work hard, we can overcome any difficulty, ________ di..

If we work hard, we can overcome any difficulty, ________ difficulty it is.[ ]A. whatB. howC. whateverD. however

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Winning the bid to host the Olympic Games means not only a g..

Winning the bid to host the Olympic Games means not only a great honor to a nation ________.[ ]A. but a great responsibility B. but as well as a great responsibilityC. as well as a great responsibilityD. but a great responsibility as well

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________the new belling sounds gentle and formal, it will be..

________the new belling sounds gentle and formal, it will be some time before we can adapt to it.[ ]A. Since B. Although C. When D. In case

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John thinks it won't be long ________ he is ready for his n..

John thinks it won't be long ________ he is ready for his new job.[ ]A. whenB. after C. beforeD. since

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We planted all kinds of fruits on the hill, ______ beaches, ..

We planted all kinds of fruits on the hill, ______ beaches, pears, apples and so on.[ ]A. for exampleB. as C. as ifD. such as

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