Question

【题目】Looking around on the crowded bus,he caught a man _______ his hand into the pocket of an old man.

A. put

B. to be putting

C. to put

D. putting

Answer 1

【答案】D

【解析】考查动词句型。catch sb. doing sth.意为“碰巧撞见某人正在做某事”．而且catch只跟现在分词作宾语补足语。