Reading about vacations with a difference Unit 1 Protecting turtles in Costa Rica Unit 2 The Leeuwin tall ship Unit 3 An archaeology vacation Unit 4 Tourism in Antarctica Unit 5 Walking Hadrian's Wall Reading about transportation Unit 6 Airships Unit 7 China's Grand Canal Unit 8 The Pony Express Unit 9 Sao Paulo: a city of helicopters Unit 10 The world's most dangerous road? Reading about cities Unit 11 The lost city of Petra Unit 12 Changing lives with new technology Unit 13 Megacities Unit 14 Venice in danger Unit 15 Rooftop farming Reading about extreme sports Unit 16 Cave diving Unit 17 Lynne Cox:long-distance swimmer Unit 18 An interview with a rock climber Unit 19 Running an ultramarathon Unit 20 The paraskiing couple Appendices Word list Answer key
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