◎ 题干
— Why did you step on my foot?
— I am terribly sorry. I ____ it.
[     ]
A. am not noticing
B. didn't notice
C. don't notice
D. haven't noticed
◎ 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“— Why did you step on my foot? — I am terribly sorry. I ____ it. [ ]A. am not noticing B. didn't notice C. don't notice D. haven't noticed …”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。