Ответ:

Ex. 1

1. closer

2. the fastest

3. the most tiring

4. more comfortable

5. cheaper

6. more enjoyable

7. smaller

8. better

Ex. 2

1. have visited

2. is reading

3. bring

4. will spend

5. was

6. fries

Ex. 3

1. how many

2. how much

3. how many

4. how much

5. how much

6. any

7. some

8. some