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16.-Why didn't you try to finish your test?
-I tried to,but _________ I could,the bell rang.(  )
A.untilB.whenC.afterD.before

分析 ---你为什么不尽力完成你的考试?
---我尽力了,但在我做完之前,铃声就响了.

解答 答案:D.根据选项 until直到…,before在…前,when当…时,before 在…之前,after在…之后,再结合句意,我还没来得及做完,铃声就响了,可知此处缺少了一个引导时间状语从句的连接词,故D正确.before…可翻译为,还没来得及…

点评 本题考查时间状语从句的连接词,在充分分析句型再结合语义的基础上便能选出正确答案,同时要注意其他选项的意思,

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