Question

【题目】Not until I began to work __________how much time I had wasted.

A. didn’t I realize B. did I realize

C. I didn’t realize D. I realized

Answer 1

【答案】B

【解析】试题分析：句意，直到我开始工作，我才意识到自己已经浪费了很多时间。not until，引导的时间状语从句置于句首，从句要用陈述语序，主句要用倒装语序，故选B。