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    the problem, he wouldn't have committed those mistakes. A. If he understood B. Had he understood C. When he had understood D. If he would understood 【查看更多】

     

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    ________the problem, he wouldn't have committed those mistakes.

    A. If he understood    B. Had he understood    C. When he had understood   D. If he would understood

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    ________the problem, he wouldn't have committed those mistakes.

    A．If he understood

    B．Had he understood

    C．When he had understood

    D．If he would understood

     

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