◎ 题干
I _____ swim last year.
[     ]
A. can
B. could
C. can to
D. could to
◎ 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“I _____swim last year. [ ]A. canB. could C. can to D. could to …”主要考查了你对  【情态动词】【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。