A new survey shows that 54 percent of Americans do not take prescription medicines ________ though they are important to their health.

试卷相关题目

• 1_____ you have made a promise, you should carry it out.    

  A.Once

  B.Until

  C.For

  D.While

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• 2Heavy objects and light objects fall at the same speed ________ air holds them back.

  A.so that

  B.if

  C.unless

  D.although

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• 3— You told Holmes about what happened in the train?  — No,I didn't. He had rushed off towards the station ________ I could say anything more.    

  A.before

  B.until

  C.when

  D.as

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• 4We'd better set off now, or it will be dark ______ we know it.

  A.until

  B.after

  C.when

  D.before

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• 5— Hurry!There is no time to Waste.     —  Ok. But I'm afraid we'll miss the train ________ we take a taxi.      

  A.when

  B.until

  C.unless

  D.if

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• 6His father got him a job in a bank but soon it became clear ________ he was not fit for that kind of work.

  A.why

  B.what

  C.whether

  D.that

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• 7______ published fifty years ago, his work still attracts much attention at present.   

  A.As

  B.Though

  C.Apart from

  D.Despite

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• 8Bella is really a good colleague in the office, I mean, _______ we don't have everything in common.

  A.as if

  B.so that

  C.even though

  D.now that

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• 9The story is so interesting that he doesn't tear himself away from the TV ________ it is time for lunch.

  A.as long as

  B.unless

  C.even though

  D.if

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• 10_____  the Internet is of great help, I don't think it's a good idea to spend too much time on it.

  A.If

  B.While

  C.Because

  D.As

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