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    29．If we had taken such effective measures much earlier, the river so seriously now. A．is not polluted B．would not be polluted C．had not been polluted D．would not have been polluted 【查看更多】

     

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    If we had taken such effective measures much earlier, the river ________ so seriously now.

    A. is not polluted                      B. would not be polluted

    C. had not been polluted                D. would not have been polluted

     

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    If we had taken such effective measures much earlier, the river _____ so seriously now.
    [     ]
    A. is not polluted
    B. would not be polluted
    C. had not been polluted
    D. would not have been polluted

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    If we had taken such effective measures much earlier, the river________so seriously now.

        A．is not polluted      B．would not be polluted

        C．had not been polluted     D．would not have been polluted

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    If we had taken such effective measures much earlier, the river__________so seriously now.

        A．is not polluted          B．would not be polluted

        C．had not been polluted     D．would not have been polluted

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    If we had taken such effective measures much earlier, the river           so seriously now.

        A．is not polluted       B．would not be polluted

        C．had not been polluted      D．would not have been polluted

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