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    environmental damage is done, it takes many years for the ecosystem to recover. A. Even if B. If only C. While D. Once 【查看更多】

     

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    _____ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover.
    [     ]
    A. Even if
    B. If only
    C. While
    D. Once

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    _______ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover.

    A. Even if              B. If only        C. While         D. Once

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    ________ environmental damage is done, it takes many years for the ecosystem(生态系统)to recover．

    [　　]

    A．Even if

    B．If only

    C．While

    D．Once

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    ________ environmental damage is done, it takes many years for the ecosystem(生态系统)to recover．

    [　　]

    A．Even if

    B．If only

    C．While

    D．Once

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    ________ environmental damage is done, it takes many years for the ecosystem(生态系统)to recover．

    [　　]

    A．Even if

    B．If only

    C．While

    D．Once

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