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    33． We must do everything we can waste water from running into rivers． A． keep B． kept C． to keep D． keeping 【查看更多】

     

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    We must do everything we can _________ waste water from running into rivers．

    A． keep           B． kept            C． to keep            D． keeping

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    We must do everything we can ________ waste water from running into rivers．


    1. A.
      keep
    2. B.
      kept
    3. C.
      to keep
    4. D.
      keeping

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    We must do everything we can ________ waste water from running into rivers．

    [　　]
    A．

    keep

    B．

    kept

    C．

    to keep

    D．

    keeping

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    We must do everything we can ________ waste water from running into rivers．

    [　　]

    A．keep

    B．kept

    C．to keep

    D．keeping

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    We must do everything we can ________ waste water from running into rivers．

    [　　]

    A．to keep

    B．kept

    C．keep

    D．keeping

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