Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.

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• 1Even if there is no scientific proof yet ______ secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk．

  A.which

  B.that

  C.when

  D.Where

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• 2_____ you are familiar with the author's ideas, try reading all the sections as quickly as you possibly can.

  A.Now that

  B.Ever since

  C.So that

  D.As long as

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• 3It wasn't such a good dinner _____ she had promised us.

  A.that

  B.which

  C.as

  D.what

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• 4Mr Brown arranged for the taxi to come at six _____ she would not have to wait long at the station.

  A.so that

  B.even if

  C.before

  D.Because

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• 5Rod is determined to get a seat for the concert __________ it means standing in a queue all night.

  A.so that

  B.however

  C.even though

  D.as if

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• 6______ the stage design was terrible, the special effects were disappointing.

  A.As

  B.Unless

  C.Although

  D.As soon as

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• 7There is probably no better way for a foreigner to appreciate the richness and variety of the English language ______ by studying the various ways in which Shakespeare used it.

  A.where

  B.as

  C.than

  D.So

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• 8Pointing to the house on ______ roof grew lots of bush, the old man told me that was ______ I would stay.

  A.its ；what

  B.whose ；what

  C.whose ；where

  D.its ；where

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• 9---Do you think the weather will be all right this summer? ---No, _______ we're lucky. The newspaper says it'll be very hot anyway.

  A.unless

  B.if

  C.though

  D.As

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• 10--- Why were you absent yesterday? --- I caught a cold, _______I had been walking around in the rain.

  A.but

  B.so

  C.and

  D.For

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