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    Sam coins since he was eleven years old, and now he has hundreds of them. A. collected B. had collected C. has been collecting 【查看更多】

     

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    Sam ______ coins since he was eleven years old, and now he has hundreds of them.

    A. collected                   B. had collected    

    C. has been collecting           D. had been collecting

     

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    Sam ______ coins since he was eleven years old, and now he has hundreds of them.

    A. collected                   B. had collected    

    C. has been collecting           D. had been collecting

     

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    Sam ______ coins since he was eleven years old, and now he has hundreds of them.
    A．collectedB．had collected
    C．has been collectingD．had been collecting

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    Sam ______ coins since he was eleven years old, and now he has hundreds of them.


    1. A.
      collected
    2. B.
      had collected
    3. C.
      has been collecting
    4. D.
      had been collecting

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    Sam ______ coins since he was eleven years old, and now he has hundreds of them.
    A．collectedB．had collected
    C．has been collectingD．had been collecting

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