Unit 1 Changes in the Way We Live 1
Unit 2 Civil-Rights Heroes 16
Unit 3 Security 32
Unit 4 Imagination and Creativity 47
Test Yourself(Units 1-4) 60
Unit 5 Giving Thanks 72
Unit 6 The Human Touch 87
Unit 7 Making a Living 102
Unit 8 Cloning 115
Test Yourself(Units 5-8) 129
Key to Exercises 143
Tape Scripts 165