题目

―Have you finished your composition already?    ―Yes. I _________ it in twenty minutes. A. have finished                             B. finished C. will finish                               D. had finished 答案：B 解析: 由答句中的Yes可知in twenty minutes不是表示20分钟后的将来，而是表示在20分钟之内。因为是陈述过去的某个事实，故用一般过去时。

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