题目内容
16. ―How did you pass the challenging test?
—It was a long time I found a series of suitable methods.
A. when B. until
C. since D. before
16. D 考查时间状语从句的连接词。It is a long time before…很长时间之后才……。句意:"你是怎样通过这么具有挑战性的考试的?""很久之后我才发现了一系列合适的方法。"故选D。
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