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    25． a certain doubt among the workers as to the necessity of the work. A．It existed B．There existed C．There had D．It had 【查看更多】

     

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    ________ a certain doubt among the workers as to the necessity of the work.

    A．There existed  B．It existed

    C．There had  D．It had

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    ________ a certain doubt among the workers as to the necessity of the work.

    [　　]

    A．It existed
    B．There existed
    C．There had
    D．It had

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