Before a problem can be solved, 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, no one was in the room.

  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 ____ had actually happened.

  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 have taken it.

  A.that

  B.what

  C.how

  D.whether

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• 6Some children want to chal lenge themselves by learning a language different from ______ their parents speak at home.

  A.what

  B.that

  C.which

  D.one

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• 7We don't doubt _______ we will complete all the projects before the year 2010.

  A.when

  B.if

  C.that

  D.whether

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• 8Actually, girls can be _____ they want to be just like boys, whether it is a pilot, an astronaut, or a general manager.

  A.wherever

  B.however

  C.whatever

  D.whoever

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• 9_____ some people regard as a drawback is seen as a plus by many others.    

  A.Whether

  B.What

  C.That

  D.How

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• 10— What impresses you most about your hometown? —  The street, the width of which is three times ______ it was ten years ago.

  A.that

  B.as

  C.than

  D.what

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