3. C. picture
4. A. For example
5. B. fearful
6. B. on
7. A. if
8. D. test
9. D. success
10. A. chosen
11. D. otherwise
12. C. conducted
13. B. rated
14. D. took
15. B. then
16. C. marked
17. A. before
18. C. drop
19. B. undo
20. C. necessary
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