问题补充:
Lucy fell asleep she was listening to music.
A. before
B. while
C. after
D. as soon as
答案:
A. before
(答案→)B. while
C. after
D. as soon as
解析:词义辨析。Before在……之前;while当……时候;after在……之后;as soon as一……就。根据she was listening to music用的是过去进行时,所以选B。露西听音乐时想睡觉。