Lời giải:
1. In a hotel you can phone the reception from your room for a business district.
2. You should arrive at a hotel before check-in time.
3. You want to go to the entertainment system, but you are not sure exactly where it is so you can call a taxi.
4. Last week he had three pieces of alarm call but he was allowed only one.
5. On a plane you can watch an in-flight film, but you can't make the check-in luggage work.