本站不提供该课本链接，目录如下：
Unit 1 People around us
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 2 Travelling around the world
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 3 Trees and us
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 4 Our animal friends
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 5 Water is life
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 6 Electricity everywhere
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 7 Role models of our time
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)
Unit 8 Follow your interests
　　Section 1 Experiencing and understanding language
　　Section 2 Exploring and applying rules (Grammar)
　　Section 3 Expressing and communicating ideas
　　Section 4 Extending and developing competencies
　　Focusing on culture
　　Cross-curricular connection
　　Checking your progress (Project)