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    , the professor began the lecture. A. Seen that we had taken our seats B. Having taken our seats C. When we took our seats D Seating ourselves well 【查看更多】

     

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    ________， the professor began the lecture.

    A. Seen that we had taken our seats

    B. Having taken our seats

    C. When we took our seats　　　　

    　　 D. If we took our seats

     

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    ________, the professor began the lecture.

    A．Seen that we had taken our seats         B．Having taken our seats

    C．When we took our seats                            D．Seating ourselves well

    查看答案和解析>>


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