1. canopy.
2. capable of using=able to use有能力用
3. capital-指钱
4. cases=situationsn情形，境遇
5. catastrophic=extreme
6. cautioned=warned
7. cautions=careful
8. cede放弃，割让
9. celebrated=famous.adj著名的
10. celebrated=renowned有声名的
11. certain
12. chaotic=disorganized
13. characterisitic=typical
14. charisma=appeal
15. chiefly=mostly
16. chisel=carve(chisel n.凿子v.砍凿)
17. choicest=best/expensive?我选best
18. circle=process变化过程
19. classic=typical
20. close精密的、紧密的、封闭的
21. clout轻轻敲打、破布
22. clustering=gathering.n聚类，聚集
23. coarse=rough
24. cognize
25. coheren=logical
26. coil=wire
27. collective=c
28. colonize=habited习惯，穿着的
29. colophon=c书的版本记录
30. comeback=reappearance
31. commemorate=celebrate(commemorate庆祝,纪念)
32. commitment委托事项,承诺,承担义务
33. common=sharedadj共同的
34. commonplace=standard
35. comparatively=relatively相关的
36. compelled=forced.adj强迫的，被迫的
37. compelled=obliged
38. compelling=powerful.adj强制的，强迫的
39. complement=supplement
(我选的REPLACE，错了!)
40. complex=intricate错综复杂的
41. component=part.
42. components=elements.n成分
43. components=parts.n成分
44. concealed=hid
45. conceivably=possibly
46. conceiving=imagining.n构思，设想
47. confidential=secret
48. confine=limit(confine vt.限制, 禁闭n.界限, 边界)
49. confirms=proves
50. consequently=therefore/ thus