1. non-profit
2. inventors - inventions
3. excited
4. meaningful
5. meaningless - boring
6. composers
7. contaminated - to breathe
8. carelessly
9. disadvantaged
10. donors
11. competitor - confident
12. surprising
13. disappointing
14. observing - products
15. Polluted
16. careless
17. fascinating - fascinated
IV. Verb forms:
1. Volunteering - improve
2. to come - standing
3. to sign
4. to write
5. going - saying
6. to avoid - being
7. to get - eating
8. Lying - sitting
9. go - promise - not to tell
10. repainted - do