问题：
It was _____________ back home after the experiment.
A．not until midnight did he go
B．until midnight he didn’t go
C．not until midnight that he went
D．until midnight when he didn’t go
It was _____________ back home after the experiment.
| A．not until midnight did he go |
| B．until midnight he didn’t go |
| C．not until midnight that he went |
| D．until midnight when he didn’t go |
参考答案：