问题
选择题
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
答案
答案:B
本题考查倒装结构。not until引导状语从句位于句首时,主句要倒装,故选B。句意:直到我开始工作我才意识到我已经浪费了多少时间。