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    ---I’m going to the U.S.A. ---How long you there? A. are; staying B. are; stayed C. have; stayed D. do; stay 【查看更多】

     

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    — I'm going to the U.S.A.
    — How long _____ you _____ there?
    [     ]
    A. have; stay
    B. are; stayed
    C. are; staying
    D. do; stay

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