Complete the sentences with the correct forms of the given words.

1. national, 2. development, 3. traditional, 4. national, 5. firmly, 6. arguments, 7. natural, 8. understandable, 9. western, 10. popularity, 11. comfortable, 12. traditional, 13. traditional, 14. western, 15. isolated, 16. peculiarity, 17. beginning.