Think English Pre- Intermediate – Audio CD Unit 1A Unit 1B Unit 2A Unit 2B Unit 3A Unit 3B Unit 4A Unit 4B Unit 5A Unit 5B Unit 6A Unit 6B Unit 7A Unit 7B Unit 8A Unit 8B Unit 9A Unit 9B Unit 10A Unit 10B Unit 11A Unit 11B Unit 12A Unit 12B