问题
单项选择题
Not until the meeting was over（）that he had made a mistake in his speech.
A.he realized
B.did he realize
C.hehas realized
D.has he realized
答案
参考答案：B
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Not until the meeting was over（）that he had made a mistake in his speech.
A.he realized
B.did he realize
C.hehas realized
D.has he realized
参考答案：B