问题
选择题
Not until yesterday that I had made a serious mistake.
A．didn’t I realize
B．did I realize
C．I didn’t realize
D．I realize
答案
答案：B
选B。考查倒装语序。not until接状语从句放在句首时, 主句用倒装结构。
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Not until yesterday that I had made a serious mistake.
A．didn’t I realize
B．did I realize
C．I didn’t realize
D．I realize
答案：B
选B。考查倒装语序。not until接状语从句放在句首时, 主句用倒装结构。