问题
选择题
— When did you go to bed last night?
— Very late. I didn't go to bed _____ my father came back. [ ]
A. until
B. since
C. while
D. after
答案
答案:A
— When did you go to bed last night?
— Very late. I didn't go to bed _____ my father came back. [ ]
A. until
B. since
C. while
D. after
答案:A