Before a problem can besolved, it must be obvious  ____  the problem itself  is.  

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• 1Several times Kelly heard her name called but when she turned around to see ______ it was, noone was

  A：who

  B：where

  C：why

  D：what

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• 2_____ some teenagers don"t realize is _______ difficult life can be after they get addicted to drugs

  A：What, how

  B：That, how

  C：What, what a

  D：That, what

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• 3The manager interviewed everyone involved in the accident to find out the truth behind ____ hadactua

  A：what

  B：that

  C：which

  D：it

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• 4A modern city has been set up in______was a wasteland ten years ago.

  A：what  

  B：which

  C：that  

  D：where

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• 5It is uncertain_____ side effect the medicine will bring about, although about two thousand patients

  A：that  

  B：what  

  C：how

  D：whether

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• 6Loulan City is not at all ________ a traveler who has never seen the desert before can expect.

  A：that

  B：where

  C：what

  D：which

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• 7____ she couldn"t understand was ____ fewer and fewer students showed interest in her lessons.

  A：What; why

  B：That; what

  C：What; because  

  D：Why; that

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• 8Honey is to a bee ______ milk is to a cow .

  A：that

  B：where

  C：what

  D：which

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• 9The traditional view is ______ we sleep because our brain is "programmed" to make us do so.

  A：when

  B：why

  C：whether

  D：that

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• 10The thought of going home to his family was ______ kept him happy while he was working abroad.

  A：all

  B：all which

  C：what

  D：that

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