◎ 题干
After I _____ my homework, I went out to an aquarium.

A. was doing      
B. did
C. does
D. would do
◎ 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“After I_____ my homework, I went out to an aquarium.[ ]A. was doing B. didC. does D. would do…”主要考查了你对  【助动词的过去式】【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。