He looked around and caught a man his hand into the pocket of a passenger. A. putB. to be

问题补充：

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

答案：

A. put

B. to be putting

C. to put

(答案→)D. putting

解析：此题考查非谓语动词的用法。catch sb doing sth表示”碰巧撞见某人正在做某事”，符合此句的语境。