a vacancy in the Cabinet的用法和样例：
- This will help to fill a vacancy in our knowledge.
- I hadn't got a vacancy in my office at the moment.
- They have found out the mole in the cabinet.
- After a few years in the wilderness he is reappointed to the Cabinet.
- I have heard of a vacancy in your department.
- After a few years in the wilderness he was reappointed to the Cabinet.