Unit 1 Food and Agriculture 1
Unit 2 Medicine and Disease 14
Unit 3 Space Exploration and Expedition 28
Unit 4 Science and Technology 40
Unit 5 War and Terrorism 53
Unit 6 Living and Family 65
Unit 7 Election and Politics 77
Unit 8 Education and Development 90
Unit 9 Refugees and Humanitarianism 103
Unit 10 International Meetings and International Relations 117
Unit 11 Environment Pollution and Protection 131
Unit 12 Trade and Business 145
Unit 13 Disasters and Accidents 157
Unit 14 Sports and Health 169
Unit 15 Entertainment and Leisure 186
Unit 16 Culture and Arts 198