Not until the last note died away that the concert was over. A．did the audience
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Not until the last note died away________that the concert was over.
A．did the audience realize
B．the audience realized
C．the audience did realize
D．realized the audience
试题答案
A
句意：直到最后一个音调停止，观众才意识到音乐会结束了。not until位于句首，主句形成部分倒装，四个选项中只有A项符合要求。