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    The research they had been devoted to to be of great value to the cancer patients. A. is proved B. proves C. has proved D. proved 【查看更多】

     

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    The research they had been devoted to ______ to be of great value to the cancer patients


    1. A.
      is proved
    2. B.
      proves
    3. C.
      has proved
    4. D.
      proved

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     The research they had been devoted to ______ to be of great value to the cancer patients.

       A. is proved    B. proves         C. has proved        D. proved

    查看答案和解析>>

    The research they had been devoted to ______ to be of great value to the cancer patients.

    A. is proved    B. proves         C. has proved        D. proved

    查看答案和解析>>


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