Unit 1 Learning 1
Unit 2 Employer and Employee Satisfaction 9
Unit 3 Social Problems 17
Unit 4 Strategies 25
Unit 5 Traffic and Transportation 33
Unit 6 National and International Politics 41
Unit 7 New Technologies 49
Unit 8 Competition 57
Unit 9 Energy 65
Unit 10 Health 75
Unit 11 Forest and Nature 83
Unit 12 Ecosystem 91
Unit 13 Deserts 99
Unit 14 Tourist Attractions 107
Unit 15 Matters of Public Concern 115
Unit 16 Invention 123
Unit 17 Environment 131
Unit 18 Living Species 139
Answer Key 147