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    Mary opened the door. There she had never seen before. A. a boy did stand B. did a boy stand C. a boy stood D. stood a boy 【查看更多】

     

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    Mary opened the door. There______ she had never seen before.

    A. a boy did stand   

    B. did a boy stand

    C. a boy stood  

    D. stood a boy

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    Mary opened the door. There______ she had never seen before.

    A．a boy did stand

    B．did a boy stand

    C．a boy stood

    D．stood a boy

     

     

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