Unit 1 Changes in the Way We Live
Unit 2 Civil-Rights Heroes
Unit 3 Security
Unit 4 Imagination and Creativity
Test Yourself (Units 1-4)
Unit 5 Giving Thanks
Unit 6 The Human Touch
Unit 7 Making a Living
Unit 8 Cloning
Test Yourself (Units 5-8)
Appendix Ⅰ Key to Exercises in Parts I, III, IV
Appendix Ⅱ Tape Seripts and Key to Test Papers
Appendix Ⅲ Glossary
