Exercise 1

a. some

b. any

Exercise 2

1. some

2. an

3. a

4. any

5. any

Exercise 3

a. a lot of

b. many

c. much

Exercise 4

1. She has got a lot of sun cream.

2. She hasn't got many mosquito bites.

3. There isn't much space in the room.

4. There are a lot of mosquitoes.

Exercise 5

1. an

2. a

3. a

4. has

5. a lot of

6. much

7. a

8. most

9. oldest

10. as