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    Sales of CDs have greatly increased since the early 1990s, when people to enjoy the advantages of this new technology. 【查看更多】

     

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    Sales of CDs have greatly increased since the early 1990s, when people ______ to enjoy the advantages of this new technology.    

    A. begin       B. began       C. have begun       D. had begun

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    . Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.

    A. begin       B. began C. have begun      D. had begun

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    Sales of CDs have greatly increased since the early 1990s, when people_____to enjoy the advantages of this new technology.

         A. begin               B. began                C. have begun          D. had begun

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    27．Sales of CDs have greatly increased since the early 1990s, when people       to enjoy the advantages of this new technology.

             A．begin B．began         C．have begun        D．had begun

     

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    Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.


    1. A.
      begin
    2. B.
      began
    3. C.
      have begun
    4. D.
      had begun

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