题目内容
He looked around and caught a man _____ his hand into the pocket of a passenger.
A. put B. to be putting C. to put D. putting
D
解析:
catch sb. doing sth. (偶然或突然)发现或撞见某人正在做某事。

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题目内容
He looked around and caught a man _____ his hand into the pocket of a passenger.
A. put B. to be putting C. to put D. putting
D
catch sb. doing sth. (偶然或突然)发现或撞见某人正在做某事。