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| 1. C |
2. A |
3. A |
| 4. D |
5. B |
6. D |
| 7. C |
8. D |
9. B |
| 10. B |
11. B |
12. B |
| 13. C |
14. B |
15. A |
| 16. A |
17. B |
18. D |
| 19. A |
20. D |
21. cells |
| 22. oxygen |
23. breathe |
24. lungs |
| 25. round |
26. through |
27. regularly |
| 28. stop |
29. settles |
30. causes |
| 31. coughs |
32. suffer |
33. attack |
| 34. cancer |
35. control |
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