Question

【题目】I saw some fish ________ in the lake when I walked by it.

A. swim B. to swim C. swimming D. to swimming

Answer 1

【答案】C

【解析】句意：当我走过湖边的时候，我看见在湖里有一些鱼在游泳。swim游泳，动词原形；to swim动词不定式；swimming动名词；to swimming介词to后面跟动名词形式。句中谓语动词是saw，原形是see，看见，常用于句型see sb. doing sth.看见某人正在做某事，故应选C。