Unit 1 Natural Environment 1
Unit 2 Historical Spots 9
Unit 3 People I Know 16
Unit 4 Letters of Application 24
Unit 5 Computers 32
Unit 6 Sports 41
Unit 7 Women 50
Unit 8 Health 58
Unit 9 Bad Days 64
Unit 10 Pollution 71
Additional Material 1 78
Additional Material 2 85
期中试卷 93
期末试卷 101
参考答案 110