问题

Not until I began to work ____ realize how much time I had wasted. [ ]
A: didn't I
B: did I
C: I didn't
D: I
B: did I
C: I didn't
D: I
正确答案是:
同类题型
The three Americans are used to ________ Chinese food, especially dumplings.
Excuse me, may I have_______ water–Sorry, there isn’t ______ water in the cup.
Li Gang was required to apologize ________the people present at the meeting________what he had done
He told me about the news in a voice.
Helen listened carefully _____ she might discover exactly what she needed