1b
2d
3d
4c
5c
6d
25c
26a
27b
28a
29b
30b
___
1 d -> easily
2. die -> death
3. occasional -> occasionally
4. shame -> shy
5. instruct -> instruction
6. science -> scientific
7. please -> pleasure
8. sadness -> sad
9. national -> nations
10. courage -> encourages
11. equal -> equality
12. industry -> industrial
13. automatic -> automatically
14. manufacture -> manufactured
15. consequence -> consequently
16. rich -> enrich
17. disappointing -> disappointed
18. apparent -> apparently
19. financial -> finance
20. extinction -> extinct