ⅠCDCDABCBDC Ⅱ.11. happily 12. smaller 13. annoyed 14. more careful 15. trouble 16. dead 17. better 18. unhappy 19. playing20. to lock 21. learning 22. crying 23. smoking 24. go 25.has made Ⅲ. 26.B 27. D 28. B 29. B 30. D 31. B3。