back home after the party.A. It was not until midnight did he goB. It was until midnight

问题补充：

back home after the party.

A. It was not until midnight did he go

B. It was until midnight that he didn’t go

C. Not until midnight did he go

D. It was midnight that he didn’t go

答案：

A. It was not until midnight did he go

B. It was until midnight that he didn’t go

(答案→)C. Not until midnight did he go

D. It was midnight that he didn’t go

解析：not until位于句首时，主句用部分倒装。所谓部分倒装就是把谓语动词的一部分，即助动词、情态动词、系动词移至主语的前面。因为前面有了助动词或情态动词，所以后边的动词要用原形。