问题
选择题
Not until he failed in the last examination _________ he should have spent more time on study.
A.did he realize
B.he realized
C.did he not realize
D.he didn’t realize
答案
答案:A
题目分析:考查倒装句:句意:直到他在最后一次考试中失利,他才意识到他应该在学习上多花些时间。Not until引导时间状语从句置于句首,后面的主句用部分倒装,以前前面是not until,后面是肯定句,选A。