UNIT 1 The Developing World 1
Topic 1 China has developed rapidly in recent years 1
Topic 2 What has happened to the population? 9
Topic 3 The world has changed for the better 16
UNIT 2 Saving the World 23
Topic 1 There are many kinds of pollution around us 23
Topic 2 None of us likes pollution 30
Topic 3 How green are you? 38
REVIEW 1 Review of Units 1～2(Mid-term Exam) 46
UNIT 3 English around the World 54
Topic 1 English is widely spoken around the world 54
Topic 2 Can you speak more slowly,please? 62
Topic 3 I don't know how to remember new words 70
UNIT 4 Magical science 77
Topic 1 Fantastic trip! 77
Topic 2 When was it made? 85
Topic 3 Perhaps people will fly to Mars 92
REVIEW 2 Review of Units 3～4(Mid-term Exam) 101