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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 【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.
    [     ]
    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． 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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