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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 【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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