— You’d better keep quiet in class.— Sometimes I______ . Yesterday, I was as quiet as a mouse during my English class.
In copying this paper, be careful not to _______ any word.
Who ________ a theory about black holes?
---How about your journey to Mount Emei? ---Everything was wonderful except that our car ________ twice on the way.
I feel it is your husband who ________ for the spoiled child.
Only when the war was over ________ return to their hometowns.