The average of books bought by him each month ________ 4, that's to say, an average of 4 books ________ bought by him．

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• 1The staff of the hotel ________ very friendly．

  A.is

  B.are

  C.looks

  D.seems

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• 2As you can see, the number of cars on roads ________ rising these days．

  A.was keeping

  B.keep

  C.keeps

  D.were keeping

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• 3I as well as they ________ ready to help you when you are in trouble．

  A.are

  B.were

  C.am

  D.was

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• 4Not only Tom but I and Bob ________ a lot of English songs so far．

  A.has learned

  B.have learned

  C.learned

  D.had learned

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• 5There _________ a great number of people waiting to buy the tickets and the number of them _________ increasing．

  A.is ;is

  B.are ;are

  C.are; is

  D.is; are

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• 6One out of ten students ________ to study in a classroom of no air-conditioner．

  A.choose

  B.chooses

  C.is choosing

  D.are choosing

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• 7Three-quarters of the land here ________ wet land, an ideal place for migrating birds．

  A.are

  B.having been

  C.is

  D.being

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• 8It is I that ________ your true friend．

  A.am

  B.were

  C.is

  D.are

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• 9________ of the boys ________ from China．

  A.Two-third ;are

  B.Two-thirds ;are

  C.Two-third ;is

  D.Two-thirds ;is

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• 10A board ________ by the side of the well on which these words ________ ,“Danger．Keep off!”

  A.set up; wrote

  B.put up; wrote

  C.was put up; is written

  D.was set up; were written

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