http://www.listeningexpress.com/nce.htm 这里是听力，我试过，没问题，第一册的不全
课后答案，我就没办法了。
Answers to NCE2 Exercises
Lesson 1: bcbdc adbac cc
Lesson 2: cdcca bbadc db
Lesson 3: cacac bccba bb
Lesson 4: dbabb acbca cc
Lesson 5: cadbc dabcb bd
Lesson 6: dacdd adaba da
Lesson 7: bccda cdacb ab
Lesson 8: dbbac cbbad bb
Lesson 9: cbdaa bbdbb dc
Lesson 10: addcb cacac ca
Lesson 11: bbbab ccacc bd
Lesson 12: ccadd adacd aa
Lesson : 13 bdbca bbcaa ad
Lesson 14: bcacd bcbcb bb
Lesson 15: dbcbc dadcc cb
Lesson 16: aadab adadd da
Lesson 17: dbbdc cbaac ad
Lesson18 : Bdbdb cdcac cb
Lesson 19: Adccd bcbca cc
Lesson 20: Bcbbc bcacc da
Lesson 21 : cdcda cbbad cc
Lesson 22: dbddb dacda bb
Lesson 23: aaacc addbb ad
Lesson 24: baaca acccb ab
Lesson 25: cbbab cdbaa da
Lesson 26: adcbc ddabd bd
Lesson 27: dcddd baddc cc
Lesson 28: cdbbc dbdcd ba
Lesson 29: bccbd babbb cb
Lesson 30: aadab cccda dd
Lesson 31: dbaca adabc ac
Lesson 32: cccbb cadad bc
Lesson 33: dbdac bbccc ac
Lesson 34: dabca dcbcb ca
Lesson 35: adadd adaba dd
Lesson 36: addcd ccbad cc
Lesson 37: cbbbb dacdb ba
Lesson 38: bcaac bddba dd
Lesson 39: dacdd abacc ab
Lesson 40: ccbca acbbb bd
Lesson 41: aacdc bbada cb
Lesson 42: dddbb cddac da
Lesson 43: bbaad daccd ac
Lesson 44: cbccc bdaba bd
Lesson 45: bdabb dcbcb db
Lesson 46: acdda cbcad ca
Lesson 47: dabad aaddc ac
Lesson 48: cbcba cbbda bc
Lesson 49: dabab ccacc aa
Lesson 50: dbacc aadbb cd
Lesson 51: bcddd adcad db
Lesson 52: bccab dcbac bd
Lesson 53: cdacc cdcda cc
Lesson 54: dbdbd badcb dd
Lesson 55: aabda acabd ab
Lesson 56: cacca cabbc cc
Lesson 57: abbbb dcdcb da
Lesson 58: bdaac bdcad bd
Lesson 59: dbddd abada ab
Lesson 60: bacbc babac ad
Lesson 61: bacca dcabb dd
Lesson 62: addcd ccbda db
Lesson 63: dbaab ddacd ca
Lesson 64: ccccb bccab bb
Lesson 65: adbbc aadcc bd
Lesson 66: cbaad aabab ba
Lesson 67: daddd dbbad dd
Lesson 68: bbcdb bbccc aa
Lesson 69: abcbb ddaab cd
Lesson 70: dbccd bcacd dc
Lesson 71: bdbbc cdbbc ba
Lesson 72: acadb accdb ad
Lesson 73: cadac dadaa db
Lesson 74: baccd cacbc ab
Lesson 75: cabdb abbdd cc
Lesson 76: dbdaa bbacb dd
Lesson 77: acabc dddaa ba
Lesson 78: acbbc acbab ca
Lesson 79: bdcca dbada ac
Lesson 80: cbdad cadcc db
Lesson 81: daadb bdcbd bd
Lesson 82: abadc cdaac bd
Lesson 83: bacca bcbcd ab
Lesson 84: ccabd cccda cd
Lesson 85: ddbab abdbb dc
Lesson 86: bcabb bdcab bc
Lesson 87: cdcda ccada ad
Lesson 88: cbbcc abbcc cb
Lesson 89: aadad dadbd db
Lesson 90: bccca bcbad dd
Lesson 91: dbcbc dbbcb cb
Lesson 92: bcdcb abbad ca
Lesson 93: cdbac ccdcb db
Lesson 94: abcba dacda bc
Lesson 95: dabad cdcac dc
Lesson 96: dccba dcdab cb
以上是二册的，不知道对不对
这些是三册的
1. dacc dbdd cbba
2. ddcb dbca baac
3. ddad bcbb adbb
4. acdb dcbc dbca
5. cbab cdbc cbdd
6. bacc baad aabc
7. bdba cbca adbb
8. ccdd aacc badc
9. adac bdba bcca
10. dcab ddbd acba
11. ccad cbaa cadb
12. cdab dcbc bdda
13. dccc bbbc adab
14. bbaa cbac bddc
15. cdab bdac acbb
16. cbbd dcdb abca
17. daaa abdd accd
18. acdc cbad dabc
19. abab dabd dbca
20. cbbc acda cdad
21. Bdca abbb caad
22. accc acca ddbc
23. dadc bcac ddbb
24. acaa dbcb dada
25. cadc bdad baac
26. dacc bacd cdba
27. adbb bbdc cabc
28. bcbd cadc cbba
29. cbaa aabc ddcb
30. dadb cbaa cbda
31. bbdc baaa ddcd
32. abac bdcc dbca
33. cbab daac cbad
34. bbcd dcad cbac
35. cbbd cdcc adbd
36. dccb dabb acad
37. bcab cadc ddba
38. bdad cbcb aaca
39. caad adbc acbc
40. accd adcc bada
41. dbac acbb abba
42. dabc cbdb cadb
43. bccb badc cadb
44. dccd bacd bacd
45. bddb aaba dcca
46. cddc dabc bacb
47. cbac acaa ccab
48. abcd aacd bcba
49. bddc dcca cbac
50. cadd bcba ccbb
51. cbdb caaa abaa
52. acdb cdba cdad
53. cdcb acaa cabb
54. bdac cacd bbbc
55. bcab caac acba
56. bacc dcbc adca
57. ddba cbcd accb
58. cbda aaca bbdd
59. adad bddb badb
60. bbdb bcac cbac
新概念第四册课后答案
Lesson 1. C,A,B,D,D,B,D,A,A,C,A,B
Lesson 2. B,C,B,D,C,A,C,A,A,D,B,C
Lesson 3. C,A,B,D,A,C,D,A,B,A,C,D
Lesson 4. A, C,C,A,B,B,C,D,A,A,B,D
Lesson 5. C,A,B,A,B,D,A,C,B,B,D,D
Lesson 6. C,A,C,C,C,A,A,A,D,B,A,A
Lesson 7. D,C,A,B,A,B,A,C,D,A,A,C
Lesson 8. B,D,A,B,D,B,A,A,B,C,B,C
Lesson 9. C,D,B,A,A,C,A,B,A,C,A,D
Lesson 10. C,A,A,B,D,C,B,B,D,C,A,A
Lesson 11. A,A,B,D,D,D,A,D,D,B,D,B
Lesson 12. C,A,B,A,C,C,D,A,C,A,A,B
Lesson 13. A,C,D,A,C,B,D,A,B,C,A,D
Lesson 14. D,B,D,C,C,A,C,C,B,D,B,D
Lesson 15. C,A,D,C,D,D,B,A,C,A,C,A
Lesson 16. A,B,C,C,A,D,D,B,A,B,A,C
Lesson 17. B,B,A,D,A,B,B,D,C,D,C,A
Lesson 18. B,A,B,C,D,C,D,C,C,C,B,A
Lesson 19. B,B,C,A,D,A,A,B,D,D,B,C
Lesson 20. B,C,A,D,C,C,C,B,D,B,C,A
Lesson 21. B,D,B,B,A,A,D,D,A,B,C,A
Lesson 22. C,D,A,C,B,A,D,B,C,D,A,B
Lesson 23. C,A,D,C,C,D,C,A,B,C,A,C
Lesson 24. A,A,C,C,B,C,A,D,D,A,C,D
Lesson 25. D,B,A,D,D,C,A,C,D,B,C,A
Lesson 26. C,B,C,B,A,C,D,D,A,B,A,C
Lesson 27. B,C,D,C,C,A,C,C,D,D,D,A
Lesson 28. A,D,C,D,A,B,C,A,D,A,B,D
Lesson 29. C,C,A,D,D,C,C,A,D,A,B,C
Lesson 30. C,A,B,D,D,B,C,C,A,C,D,C
Lesson 31. A,A,B,A,D,B,A,D,D,C,B,D
Lesson 32. B,D,C,B,A,D,B,D,C,A,B,C
Lesson 33. B,D,B,A,D,B,C,C,D,C,B,A
Lesson 34. D,C,A,C,B,D,A,C,D,B,C,A
Lesson 35. C,B,C,A,C,A,B,B,D,C,C,D
Lesson 36. A,C,B,C,C,A,C,C,D,B,A,C
Lesson 37. C,A,B,A,C,D,B,C,D,C,B,D
Lesson 38. C,A,A,B,B,A,C,B,D,D,A,B
Lesson 39. B,C,A,D,A,B,D,D,B,D,B,C
Lesson 40. D,C,D,A,C,A,D,D,D,A,D,B
Lesson 41. A,C,A,C,D,C,B,B,B,D,B,C
Lesson 42. B,C,C,B,D,B,D,A,D,C,A,C
Lesson 43. D,B,A,B,C,C,D,D,A,C,B,B
Lesson 44. A,A,A,A,B,B,B,B,D,C,B,A
Lesson 45. C,A,D,A,C,C,A,C,D,C,D,C
Lesson 46. B,B,D,B,D,A,B,C,D,A,B,D
Lesson 47. C,A,A,D,B,C,A,C,D,B,B,C
Lesson48. C,C,B,C,C,C,C,D,B,A,A,B
这些都是找的，不是老师给的，不知道对不对，
希望对你有帮助
参考资料：
http://www.listeningexpress.com/nce.htm 听力的答案已经尽心尽力了,至于课后答案在新概念的自学导读里有,不过我在下载尤其是免费下载方面的确懂的不多,所以只能让你自己去找找看了.