新概念2 从50课到68课的课后答案

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