Unit 1 The Scientist 2
Part Ⅰ Listening TaskListening Practice 3
Part Ⅱ Reading TaskText A The Last Years of a Nobel Laureate 4
Part Ⅲ Home Reading TaskText B Oxford and Cambridge 29
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:group discussion 38
Essay Writing:writing an essay on any of the topics 38
Unit 2 Economic Life 40
Part Ⅰ Listening TaskListening Practice 41
Part Ⅱ Reading TaskText A Ethics and the Consumer 42
Part Ⅲ Home Reading TaskText B Time Dollars 66
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:role play 72
Practical Writing:writing letters of complaints and responses 72
Unit 3 Human Weaknesses 78
Part Ⅰ Listening TaskListening Practice 79
Part Ⅱ Reading TaskText A Is He Living or Is He Dead? 80
Part Ⅲ Home Reading TaskText B Edward Mills and George Benton:A Tale 106
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:mock debate 115
Essay Writing:writing an essay on any of the topics 115
Unit 4 The Meaning of Work 118
Part Ⅰ Listening TaskListening Practice 119
Part Ⅱ Reading TaskText A Assembly Line Adventure 120
Part Ⅲ Home Reading TaskText B The Search for Meaning in Wark 143
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:group discussion 152
Practical Writing:writing letters of recommendation 152
Unit 5 Research Ethics 174
Part Ⅰ Listening TaskListening Proctice 175
Part Ⅱ Reading TaskText A Falsity and Failure 176
Part Ⅲ Home Reading TaskText B On Being a Scientist:Responsible Conduct in Research 197
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:speech contest 208
Practical Writing:writing a research paper（1） 208
Unit 6 Euthanasia 218
Part Ⅰ Listening TaskListening Practice 219
Part Ⅱ Reading TaskText A Accidents,Suicide,and Euthanasia 220
Part Ⅲ Home Reading TaskText B A Daughter's Dilemma 241
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:mock debate 248
Essay Writing:writing an essay on any of the topics 248
Unit 7 Nature and Man 250
Part Ⅰ Listening TaskListening Practice 251
Part Ⅱ Reading TaskTedtA A Wilderness Experience 252
Part Ⅲ Home Reading TaskText B Once More to the Lake 278
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:group discussion 287
Essay Writing:writing an essay on any of the topics 287
Unit 8 Earth and Space 290
Part Ⅰ Listening TaskListening Practice 291
Part Ⅱ Reading TaskText A Except from"The Shores of the Cosmic Ocean" 292
Part Ⅲ Home Reading TaskText B The Harmony of Worlds 317
Part Ⅳ Comprehensive Language PracticeSpeaking Practice:group discussion 327
Practical Writing:writing a research paper（2） 327
Test Yourself(Units 5-8) 329
Appendix Ⅰ Key to Exercises in Parts Ⅰ,Ⅲ,Ⅳ 348
Appendix Ⅱ Tape Scripts and Key to Test Papers 363
Appendix Ⅲ Glossary 381