Unit 1 Getting along with others 1
Part 1 Welcome to the unit&Reading 3
Part 2 Word power&Grammar and usage 14
Part 3 Task&Project 24
单元回眸 37
Unit 2 The environment 43
Part 1 Welcome to the unit&Reading 44
Part 2 Word power&Grammar and usage 53
Part 3 Task&Project 59
单元回眸 71
Unit 3 Science and nature 76
Part 1 Welcome to the unit&Reading 77
Part 2 Word power&Grammar and usage 91
Part 3 Task&Project 99
单元回眸 111