◎ 题干
He never used to swim in the river,              he?    

A. wouldn't    
B. doesn't    
C. was        
D. did
◎ 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“He never used to swim in the river,he?[ ]A. wouldn'tB. doesn'tC. wasD. did…”主要考查了你对  【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。