I often play a lot of sports ____ (keep)heathly.

问题描述:

I often play a lot of sports ____ (keep)heathly.

我经常做运动来保持身体健康.
通过理解句意我们可以知道横线上是需要一个目的状语.
英语中可以用动词不定式也就是to do 来表示目的.
因此是to keep`