I didn’t manage to work out the problem ______ the teacher had explained how.A、u

游客2025-07-27 0

问题 I didn’t manage to work out the problem ______ the teacher had explained how.

选项 A、until
B、unless
C、when
D、before

答案 A

解析

转载请注明原文地址:https://tihaiku.com/zcyy/4178794.html

相关试题推荐

随机试题

最新回复(0)

Thewriterchieflytalksabout______.[br]The"problem"inthefourthparagrap