I let the spare room.

我把那间空房出租了。

We made up the bed in the spare room.

我们在空着没用的屋里搭了张床。

B: Yes, I have a spare room.

是的，我有一间空房。

Photo above: This is the spare room.

上图：这是备用房间。

Yes, sir. We have some spare room for you.

对不起，先生，我们那天的房间已经订满。