When I got to the school,I saw many students ____ the violin in the club.(play;playing)

问题描述:

When I got to the school,I saw many students ____ the violin in the club.(play;playing)

playing, see sb. doing...看到某人正在做...,由前面的When Igot to the school得知体现进行时。

When I got to the school,I saw many students __playing__ the violin in the club.(play;playing)
see sb doing