_____(do)eye exercises is good for your eyes.填什么?写清楚理由.(以do为原型)

问题描述:

_____(do)eye exercises is good for your eyes.填什么?写清楚理由.(以do为原型)

Doing eye exercises is good for your eyes
做眼保健操对眼睛有益.
动名词doing eye exercises 作为主语