I sometimes practice conversations with friends.I think it （help) 用所给单词的适当形式填空

题目

I sometimes practice conversations with friends.I think it （help) 用所给单词的适当形式填空
We don't know _______ they broke the glasses for.A.why B.what C.when D.where

答案

I sometimes practice conversations with friends.I think it （helps)有时候我和朋友们练习对话,我觉得有帮助,第三人称单数,动词加sWe don't know _______ they broke the glasses for. A.why B.what C.when D.whe...