练习册

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    When you the classroom? Let me see . A. have, cleaned B. did, clean C. did, cleaned D. are, clean 【查看更多】

     

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    When ________ you ________ the classroom? Let me see.

    [　　]

    A．have, cleaned
    B．did, clean
    C．did, cleaned
    D．are, clean

    查看答案和解析>>

    When ________ you ________ the classroom? Let me see.

    [　　]

    A．have, cleaned
    B．did, clean
    C．did, cleaned
    D．are, clean

    查看答案和解析>>


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