John fell asleep ________he was listening to the music. [ ]A. afterB. before C. while D. as soon as-

题目简介

John fell asleep ________he was listening to the music. [ ]A. afterB. before C. while D. as soon as-

题目详情

John fell asleep ________he was listening to the music.
[     ]
A. after     
B. before     
C. while     
D. as soon as
题型:单选题难度:中档来源:同步题

答案

C

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