- 提示：点击一级目录名称可以进入相关单元学习
- .课本封面:前言和目录 .课文录音与翻译
- .Unit 1 Past and present
- .秒速快三Unit 2 Travelling
- .秒速快三Unit 3 Online tours
- .Unit 4 A good read
- .Project 1 An information folder
- .Unit 5 Good manners
- .Unit 6 Sunshine for all
- .Unit 7 International charities
- .Unit 8 A green world
- .Project 2 A report on charity
- .不规则动词 .课文注释 .单词表 .同步语法