Not until then___that he was mistaken,when actually gave me much trouble.

分类: 作业答案 • 2021-12-31 11:41:24

问题描述：

Not until then___that he was mistaken,when actually gave me much trouble.
A.did l realize
B.had l realized

答

选A,因为then在那时候,是一般过去式的时间状语