新概念英语2答案第49到73课的,就是课后的选择题.

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 ...