封面/前言/目录
Unit 1 Classmates
Unit 2 Teachers
Unit 3 Animals
Revision 1
Unit 4 Shopping Day
Unit 5 TV Shows
Unit 6 Chores
Revision 2
歌曲
词汇表
Unit 1 Classmates
Unit 2 Teachers
Unit 3 Animals
Revision 1
Unit 4 Shopping Day
Unit 5 TV Shows
Unit 6 Chores
Revision 2
歌曲
词汇表
