问题
选择题
He had to be reminded two or three times ________ he could avoid making the same mistake.
A.before
B.until
C.when
D.after
答案
答案:A
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。