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    much English troubled him a lot. A．His not knowing B．Not he knowing C．His having not known D．His not known 【查看更多】

     

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                 much English troubled him a lot.

    A．His not knowing      B．Not he knowing  C．His having not known    D．His not known

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    ________ much English troubled him a lot.

    [　　]

    A．His not knowing
    B．Not he knowing
    C．His having not known
    D．His not known

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