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Unit 1 The Perfect Swarm
Unit 2 The Red Devils
Unit 3 The Orient Express
Unit 4 The Varied Cultures of China
Unit 5 Afghanistan's Heroic Artists
Unit 6 Natacha's Animal Rescue
Unit 7 Firewalking
Unit 8 Living in the Slow Lane
Unit 9 Alternative Energy
Unit 10 Mars on Earth
Glossary