Unit 1 Love and Friendship 1
Communicative Samples 1
Paragraph Reading A:Friendship 2
Paragraph Reading B:Friendship 5
Grammar Focus：情态动词（一） 8
Unit 2 Customs and Habits 13
Communicative Samples 13
Paragraph Reading A:Beliefs and Interests 14
Paragraph Reading B:Gender Tax 17
Grammar Focus：情态动词（二） 20
Unit 3 Human and the Earth 25
Communicative Samples 25
Paragraph Reading A:The Meaning of the 21st Century 26
Paragraph Reading B:Imagine Earth without People 30
Grammar Focus：主谓一致（一） 34
Unit 4 Youth and Dreams 39
Communicative Samples 39
Paragraph Reading A:The Autumn——the Harvest Season 40
Paragraph Reading B:The Two Roads 43
Grammar Focus：主谓一致（二） 45
Unit 5 Festivals and Holidays 50
Communicative Samples 50
Paragraph Reading A:The Thanks We Give 51
Paragraph Reading B:The Origins of the April Fool's Day 55
Grammar Focus：虚拟语气 57
Unit 6 Language and Culture 63
Communicative Samples 63
Paragraph Reading A:Proverbs 64
Paragraph Reading B:What Is the Worth of Words? 67
Grammar Focus:名词性从句 71
Unit 7 Time and Money 76
Communicative Samples 76
Paragraph Reading A:The Value of Time 77
Paragraph Reading B:Your Money Is Your Life 81
Grammar Focus：定语从句（一） 84
Unit 8 How to Learn 89
Communicative Samples 89
Paragraph Reading A:The Special Joy of Super-slow Reading 90
Paragraph Reading B:Feed Your Mind 93
Grammar Focus：定语从句（二） 96
Unit 9 Weather and Climate 101
Communicative Samples 101
Paragraph Reading A:The Weather in Britain 102
Paragraph Reading B:Weather 106
Grammar Focus：状语从句（一） 108
Unit 10 Education 114
Communicative Samples 114
Paragraph Reading A:In Amy's Eyes 115
Paragraph Reading B:Culture and Arts 119
Grammar Focus：状语从句（二） 122
Unit 11 Traffic and Transmission 127
Communicative Samples 127
Paragraph Reading A:The Breakdown Assistance 129
Paragraph Reading B:A Letter 131
Grammar Focus：交际用语和习惯表达（一） 134
Unit 12 Environment and Conservation 139
Communicative Samples 139
Paragraph Reading A:The Air Pollutant 141
Paragraph Reading B:Greenspace 144
Grammar Focus：交际用语和习惯表达（二） 147
Glossary 152
Model Test 1 172
Model Test 2 180
Answer Keys 189