Many students didn’t realize the importance of study they left school.A. whenB. untilC. a

发布时间：2020-08-21 03:17:00

Many students didn’t realize the importance of study      they left school.
A. when
B. until
C. after
D. unless

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A. when
(答案→)B. until
C. after
D. unless
解析：此题考查对语句的理解，及重点句型结构，not…until
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