The key answer of exercise 2

a)

1. a
2. an
3. a
4. a
5. an
6. a
7. a
8. a
9. an
10. a
11. a

b)

1. camera
2. umbrellas
3. books
4. watches
5. emails
6. countries
7. cities
8. keys
9. addresses
10. laptops
11. debit cards

c)

1. What is it? It's a dictionary.
2. What are they? They're keys.
3. What is it? It's a photo.
4. What are they? They're pens.
5. What is it? It's an ID card.
6. What is it? It's a door.
7. What is it? It's a table.
8. What are they? They're coats.