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    31．There is no doubt man will conquer nature some day. A．whether B．why C．which D．that 【查看更多】

     

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    There is no doubt ______ man will conquer nature some day.

    A．whether

    B．if

    C．which

    D．that

     

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    There is no doubt      man will conquer nature some day.

    A．whether       B．why      C．which      D．that

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