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    Mr Smith a book about China last year but I don't know whether he has finished it. A. has written B. wrote C. had written D. was writing 【查看更多】

     

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    Mr Smith ____ a book about China last year but I don't know whether he has finished it.
    [     ]
    A. has written
    B. wrote
    C. had written
    D. was writing

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