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    How many more decades will have to pass scientists succeed in providing a cure for cancer? A. when B. before C. until D. since 【查看更多】

     

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    How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?

    A．when

    B．since

    C．before

    D．until

     

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    How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?


    1. A.
      when
    2. B.
      since
    3. C.
      before
    4. D.
      until

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    How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?

           A．when              B．since               C．before                  D．until

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    How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?

    A．when               B．since                C．before            D．until

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    How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?

    A．whenB．sinceC．beforeD．until

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