A-A+
Only then ______ that I had made a terrible mi
问题详情
Only then ______ that I had made a terrible mistake.
A) I realized B) did I realize
C) I had realized D) had I realized
参考答案
Bonly引导的时间状语then位于句首，句子部分倒装，需要加助动词did。
考点：
