本站不提供该课本链接，目录如下：
Unit 1 What do we do at the weekend?
Unit 2 How do we stay healthy?
Unit 3 What do you know about different countries?
Unit 4 What's interesting about holidays?
Unit 5 What are living things?
Unit 6 Why should we take care of the Earth?
Unit 7 How do we celebrate festivals?
Unit 8 How does music make us feel?
Project 1
Project 2
Unit checklist
Word list