Unit 1 Caring for Our Eaforth 1
Unit 2 Nobel Prize Winners 15
Unit 3 Famous Brand Names 29
Unit 4 Cloning and Ethics 43
Self-assessment Test(Unit 1—Unit 4) 58
Unit 5 Lifelong Education 70
Unit 6 Travel Around the World 85
Unit 7 Drug Abuse 99
Unit 8 Conflicts in the World 114
Self-assessment Test(Unit 5—Unit 8) 128
Key to Exercises 140
Tapescripts 170