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UnitⅠ：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

UnitⅡ：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

UnitⅢ：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

UnitⅣ：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

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