It was not until the end of the meeting.A. that she turned upB. when she turned upC. did

问题补充：

It was not until the end of the meeting.

A. that she turned up

B. when she turned up

C. did she turn up

D. had she turned up

答案：

(答案→)A. that she turned up

B. when she turned up

C. did she turn up

D. had she turned up

解析：这是强调句的形式，not---until的强调句式。