13. You can not have the window table, for it is reserved.
您不能用那張靠窗的餐桌，因為它已經預訂出去了。
還能這樣說：
The table by the window has been reseved, so you can't have it.
The window table is not available, because it has been taken by others.
14. We are a group of four.
我們有4個人。
還能這樣說：
There will be four of us.
I'd like a table for 4 people.
15. How long do we have to wait?
要等多長時間？
還能這樣說：
When will we get the table?
Do we need to wait for a long time to have the table?
應用解析：
wait on 服侍；
wait for 等待某人；
keep sb. waiting 使某人等候或耽擱某人（如因對方不準時）
16. I want to reserve a table for eight people.
我想預訂一張8個人的餐桌。
還能這樣說：
I'd like to book a table for eight people.
I want to reserve a table which is enough for eight people.
17. We can have a table reserved in a hotel.
我們可以在賓館預訂一張餐桌。
還能這樣說：
We can make a reservation for a table in a hotel.
We can book a table in a hotel.