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