11)
1. Peter used to live in a small house, but now he lives in a big house.
2. Peter used to go to work on a bus, but now he goes to work by car.
3. Peter used to eat at home, but now he eats out.
4. Peter used to watch TV, but now he goes to the theatre.
5. Peter used to spend his holidays at a camp-site, but now he spends his holidays travelling.
12)
2. used to drink
3. used to live
4. Did you used to go
5. didn't use to like
6. didn't use to eat
7. used to play
8. used to spend