Ответ:

16. Happy, Happier, The Happiest

17. Beautiful, More Beautiful, The most Beautiful

18. good, better, the best

19. much/many,

20. bad, worse, the worst

21. short, shorter, the shortest

22. hot, hotter, the hottest

23. tall, taller, the tallest

24. expensive, more expensive, the most expensive

25. honest, more honest, the most honest