◎ 题干
― When did you start your math homework?
― One hour ago, but I        it yet.
[     ]
A. didn't finish                  
B. finished
C. have finished                  
D. haven't finished
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“― When did you start your math homework?― One hour ago, but Iit yet.[ ]A. didn't finish B. finishedC. have finished D. haven't finished…”主要考查了你对  【现在完成时】  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。