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    ( )Must we keep the window all the time? A.opening B.open C.to open D.opened 【查看更多】

     

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    —Must we keep the window _______ all the time?
    —No, you don’t have to.
    A.opening   B.opened      C. open

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    —Must we keep the window _______ all the time?

    —No, you don’t have to.

    A.opening   B.opened      C. open

     

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    —Must we keep the window _______ all the time?
    —No, you don’t have to.
    A.opening   B.opened      C. open

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