Ответ:

1. seventh

2. popularity

3. unlike

4. appearance

5. completely

6. inventor

7. improvement

8. comfortable

9. highest

10. production

11. cyclists

12. exciting

13. impossible

14. based

15. central

16. residents

17. Specializes

18. colourful

19. characteristics

20. choice

21. arrangement

22. sale

23. lover

24. childhood

25. various

26. importance

27. growth

28. third

29. requires(?)

30. strength