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    Students shouldn’t be given so difficult a problem they cannot work out. A. that B. which C. while D.As 【查看更多】

     

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     Students shouldn’t be given so difficult a problem_________they cannot work out.

    A. that    B. which        C. while         D.As

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     Students shouldn’t be given so difficult a problem ___ they cannot work out.

    A. that           B. which              C. while              D.As

     

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    Students shouldn’t be given so difficult a problem ___ they cannot work out．

    A．that         B．which          C．while          D．As

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