题目内容
Many young people don't work hard, and regret it later when the opportunity is gone.They only realize it________it is too late.
A.when B.before
C.in case D.until
A
【解析】考查状语从句。句意:很多年轻人不努力,当机会失去的时候才后悔。他们认识到这一点的时候已经太迟了。when意为”当……的时候”,根据句意可知,选A。
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