The reason _________ he is late is _______ there was a breakdown on the railway．

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• 1His promise _________ he would marry her when he came back turned out to be a lie, _________ left the girl heart-broken．

  A.which; what

  B.that; which

  C.what; which

  D.which ; that

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• 2He has made some spelling mistakes in the paper; ______, they are not serious.

  A.but

  B.therefore

  C.even if

  D.however

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• 3“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses.

  A.who

  B.when

  C.which

  D.where

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• 4English is a language shared by several diverse cultures ,each of  _______uses it somewhat differently

  A.which

  B.what

  C.them

  D.those,

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• 5She has a gift for creating an atmosphere for her students ____allows them to communicate freely with each other.

  A.which

  B.where

  C.what

  D.who

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• 6You must observe and gather information like Nicolaus Copernicus ________ you want more career advancement opportunities.

  A.or

  B.because

  C.unless

  D.if

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• 7__________ printed, this science fiction will be popular among the students.

  A.Before

  B.Unless

  C.Although

  D.Once

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• 8There is no doubt _________ the world climate has been changing in recent years.

  A.that

  B.what

  C.if

  D.whether

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• 9As the visiting prime minister puts, China's influence in the world will continue to strengthen ______ its economy grows.   

  A.although

  B.until

  C.as

  D.before

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• 10_______ you keep on practicing English, I'm sure you will be able to speak it fluently.

  A.As soon as

  B.As long as

  C.Even if

  D.As if

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