I didn’t manage to do it you had explained how.A. untilB. unlessC. whenD. before

发布时间：2020-08-15 00:02:02

I didn’t manage to do it      you had explained how.
A. until
B. unless
C. when
D. before

网友回答

(答案→)A. until
B. unless
C. when
D. before
解析： not…until…结构。
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