Решение:
- 12. The mirror had a big crack in it, so we took it back to the shop.
- 13. Tom bought a beautiful ring for his wife from the jewellery shop.
- 14. I saw the coolest glasses at the optician's.
- 15. I need to go to the stationery shop to buy a battery for my MP3 player.
- 16. Take off your jumper and put it into the washing machine.
Ответ: 12. back, 13. jewellery, 14. optician's, 15. stationery, 16. off