Ответ:

1. cheap - cheaper - the cheapest

2. far - further - the furthest

3. hot - hotter - the hottest

4. cheerful - more cheerful - the most cheerful

5. pretty - prettier-the prettiest

6. red - redder - the reddest

7. noisy - noisier - the noisiest

8. terrible - more terrible - the most terrible

9. late - later - the latest

10. bad - worse- the worst

11. difficult- more difficult - the most difficult

12. few - fewer - the fewest

13. old - older - the oldest

14. sleepy - more sleepy - the most sleepy

15. thin - thinner - the thinnest

1. younger

2. highest

3. worst

4. best

5. taller

6. fastest

7. smaller

8. more modern

9. closer

10. more expensive

11. more much

12. worst

13. more comfortable

14. lighter

15. most reserved

16. harder and harder

17. driest

18. soonest, best

19. cheaper

20. older