◎ 题干
—What did Mary do last Sunday?
—She _____ her homework.
[     ]
A. did
B. do
C. was doing
D. have done
◎ 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“—What did Mary do last Sunday? —She _____ her homework. [ ]A. did B. do C. was doing D. have done …”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。