---We've seen many more days of blue skies recently. 　 ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky”program, the city only ________ about 100 days a year.　　

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• 1He went down into the cold water and after ________seemed a long time, he came out．

  A.that

  B.what

  C.which

  D.it

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• 2This is the concert hall ________ he has given very successful performances.

  A.where

  B.which

  C.that

  D.when

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• 3Was it eight o'clock _______ you got to the cinema yesterday evening?

  A.that

  B.which

  C.until

  D.when

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• 4It's a fact ____ he has not received the letter.

  A.that

  B.which

  C.whether

  D.what

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• 5______ does it take to win the hearts and minds of Grade 10 students ?

  A.How

  B.When

  C.Why

  D.What

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• 6Mr. Hopkins has not yet answered my question ______ I can go with him to______he calls the Underground Treasure House next week.

  A.that; which

  B.that; where

  C.whether; that

  D.whether; what

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• 7It's thought that it is a proper place for a new university _________ it is far from the downtown of the city.

  A.in case that

  B.now that

  C.so that

  D.in that

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• 8The suggestion _____more samples be included in the experiment will be carefully considered.

  A.what

  B.which

  C.that

  D.as

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• 9_____ you make a plan for study, you have to follow it.

  A.Even

  B.Once

  C.Unless

  D.Until

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• 10I don't know why you're worried about it. ________, it's none of your business.

  A.What's more

  B.In other words

  C.After all

  D.Worse still

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