题目

Shirley _____ a book about China last year, but I don't know whether she has finished it. A. has written 　　B. wrote 　 C. had written 　D. was writing 答案：D 解析: 受last year的干扰而误选B项，但句意为"Shirley去年（一段时间）在写一本有关中国的书，但我不知她现在是否写完"，因此答案为D.

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