Unit 1 Getting along with others 1
Period 1 Welcome to the unit＆Reading 1
Period 2 Word power 7
Period 3 Grammar and usage 12
Period 4 Task＆Project 18
单元自我检测 26
Unit 2 The environment 30
Period 1 Welcome to the unit ＆ Reading 30
Period 2 Word power 37
Period 3 Grammar and usage 42
Period 4 Task＆Project 50
单元自我检测 59
Unit 3 Science versus nature 64
Period 1 Welcome to the unit＆Reading 64
Period 2 Word power 72
Period 3 Grammar and usage 78
Period 4 Task＆Project 85
单元自我检测 93
阶段一自我检测 97
阶段二自我检测 102