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7. Complaining
8. Arrival
9. Appearing
10. Astonishing
11. Development
12. Discovery
13. Permission
14. Pleasant
15. Success

Exercise 4:

1. Feelings
2. Excitement
3. Noisy
4. Dangerous
5. Pollution/pollutants
6. Painless
7. Unfortunately
8. Choice
9. Death
10. Disappeared
11. Natural
12. Imagination
13. Exhibition
14. Helpful/helpless
15. Fame
16. Weight
17. Unemployed
18. Willing
19. Robber
20. Thrilling
21. Unthinkable
22. Scientist/scientists
23. Reality
24. Professional
25. Performance

Exercise 5:

1. Activate
2. Director
3. Unexpected
4. Advised
5. Connection
6. Painless
7. Unfamiliar