He had to be reminded two or three times he could avoid making the same mistake.A. befor

发布时间：2020-08-16 15:51:49

He had to be reminded two or three times      he could avoid making the same mistake.
A. before
B. until
C. when
D. after

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(答案→)A. before
B. until
C. when
D. after
解析：连词辨析。A.在……之前 B. 直到…… C. 当……时 D. 在……之后。句意：在他可以避免犯同样的错误之前，不得不提醒他三到两次。选A。
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