问题补充：
It was back home from work.
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：考查强调句型。It is +被强调部分 +that… 强调not…until句型的时间状语时要把not放在被强调部分里。句意：直到午夜他们才下班回家。选C
