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    18． no use the maths problem since it has already been worked out. A．It’s; to discuss B．It’s; discussing C．There is; discussing D．There is; to discuss 【查看更多】

     

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    ________ no use ________ the maths problem since it has already been worked out．

    [　　]

    A．It’s; to discuss

    B．It’s; discussing

    C．There is; discussing

    D．There is; to discuss

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