The key answer of exercise 1

a)

1. a clothes hop
2. a bookshop
3. a baker's
4. a butcher's
5. an optician's
6. an estate agent's
7. a post office
8. a pharmacy
9. a shoe shop
10. a dry-cleaner's
11. a hairdresser's
12. a gift shop

b)

1. a post office
2. a butcher's
3. a baker's
4. an estate agent
5. a gift shop
6. a hairdresser's
7. a shoe shop
8. a clothes hop
9. a bookshop
10. an optician's
11. a pharmacy
12. a dry cleaner's