a vacant seat的用法和样例：
- Is there a vacant seat in the smoking area?
- A vacant seat was found in this compartment.
- Madam, there is a vacant seat on Row 13.
- If you have a vacant seat, please let me know. I would like to change my seat.
- I heard on the old boy network that there will soon be a vacant seat on the board of a leading merchant bank.
a vacant seat的相关资料：