◎ 题干
—What are you doing,Danny? Why didn't you answer the door?  
—Sorry, mum.I _____ it.  

A. don't hear    
B. didn't hear  
C. won't hear    
D. wasn't hear
◎ 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 are you doing,Danny? Why didn't you answer the door?—Sorry, mum.I _____ it.[ ]A. don't hearB. didn't hearC. won't hearD. wasn't hear…”主要考查了你对  【实义动词】【助动词的过去式】  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。