11. C. destroyed
12. C. teacher
13. A. natural
14. B. homeless
15. B. aware of → aware
16. B. doing → do
17. C. attraction → attracts
18. C. talking
19. C. were provided
20. B. starts
21. A. to call
22. A. go usually
23. D. to see
24. A. exchange
25. B. stop
26. C. convenient





