Ответ:
3. Compound nouns:
- Sit in the waiting room.
- My sister had an accident but there was someone there who knew first aid.
- She ate something bad and now she's got food poisoning.
- Take this painkiller three times a day if your back hurts.
- My neighbour is a doctor at the medical centre down the road.
- Quickly! Get a doctor. I think this man is having a heart attack.
