Unit 1 Science and Scientists 科学与科学家Happy Reading One How to Calculate the Volume?怎样算容积 2
Happy Reading Two Higher-Ievel Robots高级机器人 4
Happy Exercise One 8
Happy Exercise Two 9
Unit 2 News and the Media 新闻与媒体Happy Reading One A Day's Work for a War Reporter一个战地记者的一天 12
Happy Reading Two The Facts事实 14
Happy Exercise One 17
Happy Exercise Two 18
Unit 3 Art and Architecture 艺术与建筑Happy Reading One Sydney Opera House悉尼歌剧院 22
Happy Reading Two Bauhaus(1919-1933)鲍豪斯风格（1919—1933） 23
Happy Exercise One 27
Happy Exercise Two 27
Unit 4 Literature and Poetry 文学与诗歌Happy Reading One Walt Whitman沃尔特·惠特曼 31
Happy Reading Two Right Here Waiting此情可待 33
Happy Exercise One 36
Happy Exercise Two 37
Unit 5 Geography 地理Happy Reading One Hawaii夏威夷 40
Happy Reading Two Australia澳大利亚 42
Happy Exercise One 46
Happy Exercise Two 47
Unit 6 Life in the Future 未来的生活Happy Reading One Something May Happen in the Future（Ⅰ）将来可能会发生的事情（Ⅰ） 50
Happy Reading Two Something May Happen in the Future（Ⅱ）将来可能会发生的事情（Ⅱ） 53
Happy Exercise One 56
Happy Exercise Two 57
Unit 7 Medicine,Health and Disease 医学、健康与疾病Happy Reading One Organ Transplant器官移植 60
Happy Reading Two My Youth Overflowing with Enthusiasm谁的青春有我狂 63
Happy Exercise One 66
Happy Exercise Two 67
Unit 8 First Aid and Medicine 急救与医药Happy Reading One Good Behavior of Two Boys两个孩子的出色表现 70
Happy Reading Two Chemical Burn化学制品烧伤 72
Happy Exercise One 76
Happy Exercise Two 77
Unit 9 Saving the Earth 拯救地球Happy Reading One Good Behavior好习惯 80
Happy Reading Two Johannesburg Summit约翰内斯堡峰会 82
Happy Exercise One 88
Happy Exercise Two 89
Unit 10 Frightening Nature 恐怖的大自然Happy Reading One Hurricane飓风 92
Happy Reading Two Bird Flu禽流感 94
Happy Exercise One 98
Happy Exercise Two 99
Unit 11 Science and Scientific Achievements 科学与科学成就Happy Reading One The First Words第一句话 103
Happy Reading Two Letter From Space穿越太空的回信 105
Happy Exercise One 110
Happy Exercise Two 111
Unit 12 Science Fiction 科幻小说Happy Reading One Electricity电 114
Happy Reading Two The Founding Father of Science Fiction科幻小说之父 115
Happy Exercise One 119
Happy Exercise Two 120
Unit 13 Water and the Ocean 水和海洋Happy Reading One Protecting Water from Pollution防止水污染 124
Happy Reading Two Deep Sea Secrets深海的秘密 126
Happy Exercise One 129
Happy Exercise Two 130
Unit 14 Civil Rights and Freedom Fighters 人权与自由卫士Happy Reading One It's Unfair!这不公平！ 134
Happy Reading Two Nelson Mandela Biography尼尔逊·曼德拉传记 137
Happy Exercise One 140
Happy Exercise Two 141
Unit 15 International Travel 国际旅行Happy Reading One How much should I tip Him?我应该付给他多少小费？ 144
Happy Reading Two Travel in Cambodia在柬埔寨旅游 149
Happy Exercise One 153
Happy Exercise Two 154
Unit 16 The USA 美国Happy Reading One A Glance at America美国一瞥 158
Happy Reading Two Americans—Friend or Stranger?熟悉而又陌生的美国人 160
Happy Exercise One 164
Happy Exercise Two 165
Unit 17 Disabilities 残疾人Happy Reading One No Wall is Too High没有过不去的坎 168
Happy Reading Two God's Medal上帝的奖牌 171
Happy Exercise One 174
Happy Exercise Two 174
Unit 18 Inventions 发明Happy Reading One The Expenses of Inventions发明的代价 178
Happy Reading Two Click,Draw and Watch in Mid-air雾做的银屏 182
Happy Exercise One 185
Happy Exercise Two 186
Unit 19 Classic Literature 文学经典Happy Reading One Venice威尼斯 190
Happy Reading Two Seven-character-quatrain七言绝句四首 191
Happy Exercise One 195
Happy Exercise Two 196
Unit 20 Archaeology 考古学Happy Reading One Stonehenge—Forever a Mystery巨石阵——永远的谜 201
Happy Reading Two Sanxingdui:History of the Discovery三星堆：发现的历史 202
Happy Exercise One 206
Happy Exercise Two 207
Keys to Exercises课后答案 209