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    -------You`ve been America, haven`t you? ------Exactly. But ? A. how did you know B. how have you known C. how would you know D. how had you known 【查看更多】

     

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    -------You`ve been America, haven`t you?
    ------Exactly. But ______?
    A. how did you know         B. how have you known      
    C. how would you know       D. how had you known

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