问题补充:
It was back home after the experiment .
A. not until midnight did he go
B. until midnight that he didn’t go
C. not until midnight that he went
D. until midnight when he didn’t go
答案:
A. not until midnight did he go
B. until midnight that he didn’t go
(答案→)C. not until midnight that he went
D. until midnight when he didn’t go
解析:本题考查强调句。强调句与not until构成It was/ is not until.... that....固定的强调句句型,故选C。