III. Choose the best answer
5. D. infectious
6. B. to
7. A. on
8. C. temperature
9. C. master's degree
10. C. Further education
11. C. major
12. A. internship
13. B. refused
14. A. be partly responsible for
15. A. fertilizer
16. D. academic year
17. D. training
18. D. enrolling
19. A. carbon
20. A. energy-saving