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    They have started an investigation, are being kept secret. A. the details of which B. which details C. the details D. the details of that 【查看更多】

     

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    They have started an investigation, ________ are being kept secret.

    [     ]

    A. details of which
    B. of which the details
    C. and the detail
    D. the details of it

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    They have started an investigation, _________ are being kept secret．

    [　　]
    A．

    the detail of which

    B．

    of which the details

    C．

    and the detail

    D．

    the details of it

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