Before a problem can  be solved, it must be obvious ______ the problem itself is.    

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• 1 ______ she was invited to the ball made her very happy.

  A.It

  B.That

  C.When

  D.Because

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• 2 ________ gone is gone.__________ no use talking about it any more.     

  A.That's; It's

  B.What's; It's

  C.It's ; That's

  D.That's ; That's

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• 3I'm sure that it is obvious ______ Gina was lying for I saw her in the street yesterday.

  A.which

  B.that

  C.because

  D.when

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• 4______ Barbara Jones offers to her fans is honesty and happiness.     

  A.Which

  B.What

  C.That

  D.Whom

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• 5_____ we call a machine is really a kind of tool that can do  work for man.         

  A.When

  B.That

  C.What

  D.Which

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• 6It doesn't matter ___________ he'll come or not.      

  A.that

  B.whether

  C.if

  D.how

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• 7—I regretted what I have done.—_______ gone is gone. ______ no use regretting it any more.

  A.What's; That's

  B.It's; That's

  C.What's; It's

  D.That's It's

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• 8 ______ the 2000 Olympic Games will be held in Beijing is not known yet.

  A.Whenever

  B.If

  C.Whether

  D.That

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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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• 10It never occurred to me _____ you could succeed in persuading him to change his mind.  

  A.which

  B.what

  C.that

  D.if

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