Contents序言 ⅢUnitⅠ：Trends in Living 1
Chapter 1 A Cultural Difference：Being on Time 2
Chapter 2 Changing Lifestyles and New Eating Habits 10
Chapter 3 Dreams：Making Them Work for Us 20
Unit Ⅱ：Issues in Society 31
Chapter 4 Language：Is It Always Spoken? 32
Chapter 5 Loneliness：How Can We Overcome It? 42
Chapter 6 Care of the Elderly：A Family Matter 52
Unit Ⅲ：Justice and Crime 63
Chapter 7 Innocent Until Proven Guilty：The Criminal Court System 64
Chapter 8 The Reliability of Eyewitnesses 74
Chapter 9 The Death Penalty in the United States：Old Enough to Kill，Old Enough to Die? 84
Unit Ⅳ：Science and History 97
Chapter 10 Ancient Artifacts and Ancient Air 98
Chapter 11 How Lunar Eclipses Have Changed History 108
Chapter 12 Mars：Our Neighbor in Space 118
Index of Key Words 130
Answer Key 136