Ответ:

1. build: plus -er = builder

2. science: minus 2 letters plus -tist = scientist

3. design: plus -er = designer

4. advise: minus 1 letter plus -or = advisor

5. labour: plus -er = labourer

6. chemistry: minus 2 letters = chemist

7. study: minus 1 letter plus -ent = student

8. rob: plus -ber = robber

9. law: plus -yer = lawyer

10. crime: minus 1 letter plus -inal = criminal

11. write: plus -r = writer

12. terror: plus -ist = terrorist

13. survive: minus 1 letter plus -or = survivor

14. library: minus 1 letter plus -ian = librarian

15. manage: plus -r = manager

16. politics: minus 1 letter plus -ian = politician

17. own: plus -er = owner

18. collect: plus -or = collector

19. direct: plus -or = director

20. guitar: plus -ist = guitarist

21. teach: plus -er = teacher

22. operate: minus 1 letter plus -or = operator

23. art: plus -ist = artist

24. piano: minus 1 letter plus -ist= pianist