Question

－Do you know Sally?

－Yes. I often saw her _______ in the gym.

A. swim    B. swam    C. swimming

Answer

A

【解析】

试题分析：句意：--你知道萨利吗？--是的，我经常看到她在健身房游泳。A. swim游泳，动词原形；B. swam游泳，动词过去式；C. swimming游泳，动词的现在分词。Saw是see的过去式。See somebody doing something,看到某人正在做某事；See somebody do something, 看到某人做某事,可以是经常做。故选A。