Module 5 Balance and harmony 1
Unit 1 Getting along with others 1
Unit 2 The environment 23
Unit 3 Science versus nature 44
期中词汇综合测试题 64
Module 6 Making a better world 72
Unit 1 Laughter is good for you 72
Unit 2 What is happiness to you？ 93
Unit 3 Understanding each other 113
Unit 4 Helping people around the world 134
期末词汇综合测试题 156
参考答案 163