问题补充:
—Did Alice sleep well last night?
—No, she didn’t. She didn’t go to bed 12 o’clock last night.
A. after
B. when
C. until
D. if
答案:
A. after
B. when
(答案→)C. until
D. if
解析:after在……之后;when当……时;until直到; if是否,如果。句意:昨晚爱丽丝睡得好吗?——不,她睡得不好。昨晚直到十二点她才去睡觉。结合语境可知选C。