It's not easy ___to play table tennis 1 learn 2 learns 3to learn 4learning 应该填什么为什么

分类: 作业答案 • 2021-12-19 17:09:16

问题描述：

It's not easy ___to play table tennis
1 learn 2 learns 3to learn 4learning 应该填什么为什么

答

3to learn ,加to do sth

It's not easy ___to play table tennis 1 learn 2 learns 3to learn 4learning 应该填什么 为什么