Do some sports _good for our health.Play tennis is a kind of sports.改正
问题描述：
Do some sports _good for our health.Play tennis is a kind of sports.改正
答
Do-Doing
play-playing
空格填is
动名词作主语，谓语动词用单数。
答
It is good for our health to do some sports.Playing tennis is a kind of sports.