◎ 题干
—Have you finished your composition already, Jack?  
—Yes, I _____ it within half an hour.  
[     ]
A. have finished
B. finish
C. finished  
D. had finished
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Have you finished your composition already, Jack?—Yes, I _____ it within half an hour.[ ] A. have finishedB. finishC. finishedD. had finished…”主要考查了你对  【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。