It is difficult for us to learn a lesson in life we’ve actually had that lesson.A. until B. after C. since D. when 题目和参考答案——青夏教育精英家教网—

题目内容

It is difficult for us to learn a lesson in life ________ we’ve actually had that lesson.

A. until B. after C. since D. when

解析：

题干为“在真正地经历过那种教训前，在生活中我们是很难得到教训的。”until=before; after; since; when等不符合题意。

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