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    -Andy, are these your books? - A. Yes, there are. B. Yes, they are. C. Yes, these are. D. Yes, it is. 【查看更多】

     

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    — Andy, are these your books?
    — _____

    [     ]

    A. Yes, there are.
    B. Yes, they are.
    C. Yes, these are.
    D. Yes, it is.

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