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    Scientists found many stones with numbers on the mountains. A. marking B. marked C. being marked D. have been marked 【查看更多】

     

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    Scientists found many stones ________ with numbers on the mountains.

           A. marking     B. marked      C. being marked     D. have been marked

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    Scientists found many stones ________ with numbers on the mountains.

    A．marking

    B．marked

    C．being marked

    D．have been marked

     

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    Scientists found many stones ________ with numbers on the mountains．

    [　　]
    A．

    marking

    B．

    marked

    C．

    being marked

    D．

    have been marked

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