=> 1. B 2. B -> bỏ "a" 3. B -> has been built 4. C -> hard 5. D -> interesting 6. B -> not to trút 7. C -> to get 8. A -> finding 9. B 10. C 11. B -> circles 12. D -> rain 13. C -> treatments 14. B -> are 15. A -> beautifully 16. C -> drinking 17. C -> to get 18. C -> for
