提示：点击单元就可进入课文学习：
- 课文目录与封面 .课文翻译与录音
- Unit 1:Stay healthy
- Unit 2:Great people
- Unit 3:Safety
- Unit 4:Stories and poems
- Unit 5:Look into science
- Unit 6:Movies and theatre
- Unit 7:Work for peace
- Unit 8:Culture shapes us
- Unit 9:Communication
- Unit 10:Get ready for the future
- Vocabulary and Structures Grammar