单项选择题

Not until I began to study ______ how much time I had wasted.

A) I realized
B) did I realize
C) I have realized
D) have I realized
<上一题 目录 下一题>
热门 试题

单项选择题
We failed to get the tickets on Sunday because there were no tickets ______.
A) attainable
B) feasible
C) vacant
D) available
单项选择题
He apologized to his mother for having ______ her.
A) offended
B) protected
C) objected
D) defended
相关试题