问题：
It was ______ his office.
A．not until the rain stopped did he leave
B．not until did the rain stop that he left
C．not until the rain stopped when he left
D．not until the rain stopped that he left
It was ______ his office.
| A．not until the rain stopped did he leave |
| B．not until did the rain stop that he left |
| C．not until the rain stopped when he left |
| D．not until the rain stopped that he left |
参考答案：