1£®“When did you go to bed last night?”“I didn’t go to bed ________ my father came back.”
A. until¡¡¡¡¡¡¡¡¡¡B. while¡¡¡¡¡¡¡¡ C. after¡¡¡¡¡¡¡¡¡¡D. when
2£®You shouldn’t keep ________ it. Everything is OK now.
A. think of¡¡¡¡¡¡ B. to think of¡¡¡¡ C. thinking about¡¡ D. think about
3£®John ________ come to see us tonight, but he isn’t sure yet.
A. may¡¡¡¡¡¡¡¡¡¡B. can¡¡¡¡¡¡¡¡¡¡ C. has to¡¡¡¡¡¡¡¡ D. must