◎ 题干
Yesterday we were busy _______ our cars.

[     ]

A. mend
B. to mend
C. mending
D. mended
◎ 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“Yesterday we were busy _______ our cars. [ ]A. mend B. to mend C. mending D. mended …”主要考查了你对  【动名词】  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。