Not a sound ______ while the professor was giving a speech.

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问题 Not a sound ______ while the professor was giving a speech.

选项 A、the students utter
B、the students uttered
C、did the students uttered
D、did the students utter

答案D

解析 倒装结构。当否定词not位于句首时,句子采用倒装结构,谓语动词的助动词提前。
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