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
网友回答
(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。