◎ 题干
The policeman saw a thief _____ a girl's money on the bus and caught him at once.

A. stole
B. stolen
C. to steal
D. stealing
◎ 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“The policeman saw a thief _____ a girl's money on the bus and caught him at once. [ ]A. stole B. stolen C. to steal D. stealing …”主要考查了你对  【实义动词的现在分词】  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。