Answer:

Exercise 4.

1. an

2. a

3. a

4. an

5. a

6. a

Exercise 5.

Nathan: Have you got a dog?

Leah: Yes, I have. I've got a cat too.

Nathan: What are their names?

Leah: The dog's name is Blackie and the cat's name is Penfold.

Nathan: Where are they now?

Leah: They're in the garden.

Nathan: Oh, yes. Look! Blackie has got an old shoe.

Leah: Hey! That's one of my new trainers!

Exercise 6.

1. b (the radio)

2. b (the afternoon)

3. c (home)

4. c (night)

5. a (an amazing)