... Conserve Conservative Bảo tồn 7. Co – operation Co – operate Co – operative Hợp tác 8. Development Develop Developing Phát triển 9. Eruption Erupt Eruptive phun 10. Expectation Expect Expectant (đầy ... ………..............……….are trying to find out new stars. (Science) 18. You should enjoy outdoor activities to develop your ....................... skills (Socially) 19. He jogs every morning to...