题目内容
【题目】John fell asleep_____he was listening to the music.
A.after B.before
C.while D.as soon as
【答案】C
【解析】
试题解析:
while引导的时间状语从句, 常用进行时态。全句意为“约翰在听音乐的时候, 睡着了。” After 意为“在….之后”, before意为“在…..之前”, as soon as 意为“一….就….”故选C
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