Unit 1 March of Penguins 企鹅远征 1
Unit 2 Trace Coke and Sundae 溯源可乐，探源圣代 9
Unit 3 Symbols of the Biggest Holidays 吉庆有寓 17
Unit 4 Turn Your Home Green 绿色行动 26
Unit 5 Catastrophic Disasters 灭顶之灾 36
Unit 6 Life inside Google 见证谷歌 44
Unit 7 III-Fated Boats 巨船悲歌 53
Unit 8 “I Have a Dream” “我有个梦” 63
Unit 9 Mysterious Mars 探秘火星 72
Unit 10 Queen Victoria 盛世女王 80
Unit 11 “Air Force One” “空军一号” 88
Unit 12 Today in History 史上今日 97
Unit 13 A Moving Shield 移动盾牌 105
Unit 14 Wind Killers 毁灭狂飙 114
Unit 15 Eagles over the Gulf 鹰击海湾 124
Unit 16 Maiden Flight of the Largest Passenger Plane 拂晓首航 133