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    It didn’t take him long he worked out the problem. A. before B. since C. when D. as 【查看更多】

     

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    It didn’t take him long ________ he worked out the problem．

    [　　]
    A．

    before

    B．

    since

    C．

    when

    D．

    as

    查看答案和解析>>

    It didn't take him long ________ he worked out the problem．

    [　　]

    A．before

    B．since

    C．when

    D．as

    查看答案和解析>>


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