Question

Not until he questioned the manager several times ___________ that the engineer-in-chief had gone to an important meeting.

1. A.
   did he tell
2. B.
   he told
3. C.
   was he told
4. D.
   he was told

Answer 1

C
not until 置于句首，部分倒装，要提前be动词、情态动词或者助动词，从句意可知，应用被动，他被告知总工程师已经去参加一个重要会议了。