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    36． the villagers realized how serious the pollution was? A．When was it that B．Was it when C．It was when that D．When it was that 【查看更多】

     

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    ________ the villagers realized how serious the pollution was?

    [　　]

    A．When was it that

    B．Was it when

    C．It was when that

    D．When it was that

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