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    I him a second letter before I from him. A. wrote- heard B. wrote- had heard C. had written- heard D. have written- hear 【查看更多】

     

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    I ________ him a second letter before I ________ from him.

    [　　]

    A．wrote, heard

    B．wrote, had heard

    C．had written, heard

    D．have written, hear

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