bill - a piece of paper which shows you how much you have to pay. receipt - a piece of paper which shows what you bought and how much you paid

You check in when you arrive at the hotel. You check out when you leave.

Full board means that the hotel provides all your meals as well as your room. Half board includes breakfast and either lunch or supper.

A double room is a room for two people, with either two beds or one large bed suitable for two people. A twin-bedded room has two separate beds.

A key is a specially-shaped piece of metal. A keycard is an electronic device in the shape of a card

‘Lift’is British English. ‘Elevator’ is American English.