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    There are three libraries in our school, were built five years ago. A. all of them B. either of them C. all of which D. both of that 【查看更多】

     

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    There are three libraries in our school, ______ were built five years ago.
    [     ]
    A. all of them
    B. either of them
    C. all of which
    D. both of that

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