Unit 1 Information Age 1
Unit 2 Artificial Intelligence 17
Unit 3 Education 35
Unit 4 Health 53
Unit 5 Tracking Down a Criminal 71
Unit 6 Humor and Daily life 92
Unit 7 Vogue of the Day 110
Unit 8 Practice and Innovation 128
Unit 9 History of the Titanic 146
Unit 10 Free-time Activities 167
Unit 11 Seafloor Exploration 185
Unit 12 Emotional Intelligence 202
Unit 13 Weather and Climate 218
Unit 14 Travel and Outdoor Life 237
Unit 15 Creative Thinking 255
Unit 16 Outer Space 274
Model Test 291
Appendix 1 Language Skills for PETS Level 5 312
Appendix 2 Script for Listening Comprehension 314
Appendix 3 Key 355
Appendix 4 Vocabulary 371