◎ 题干
— You didn't lock the back door.    
— You are wrong. I ______.  
[     ]
A. have locked it        
B. lock it myself      
C. did lock it    
D. do lock it
◎ 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“— You didn't lock the back door.— You are wrong. I ______. [ ]A. have locked itB. lock it myselfC. did lock it D. do lock it…”主要考查了你对  【一般过去时】【强调句】  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。