题目内容
Not until I began to work _________ how much time I had wasted.
A. I did realize B. did I realize C. I realized D. realized I
B

练习册系列答案
相关题目
It was not until I came here ____ I realized this place was famous, for not only its beauty but also its weather.
A.who |
B.that |
C.where |
D.before |