Unit 1 1
Text A-1 Why I Love the City 1
Text A-2 People on the Move 3
Text B-1 Caution:Bumpy Road Ahead 6
Text B-2 Memory Lane Isn't What It Used to Be 9
Unit 2 13
Text A-1 Frederick Douglass 13
Text A-2 Best of Friends,Worlds Apart 16
Text B-1 Coming to an Awareness of Language 19
Text B-2 She Wanted to Teach 22
Unit 3 25
Text A-1 Brave New World of Biometrics 25
Text A-2 Fingerprints Instead of Credit Cards 28
Text B-1 Black Box Tells Its Secrets 31
Text B-2 The Deli 34
Unit 4 37
Text A-1 Everything Equals E=mc2 37
Text A-2 Black Holes 40
Text B-1 The Cosmos 43
Text B-2 Stars 46
Unit 5 49
Text A-1 The Cost-Benefit Principle 49
Text A-2 The Economics of Product Design 51
Text B-1 Lawyers and Professors and Cars and Clothing 54
Text B-2 Why Do"Almost New"Used Cars Sell for So Much Less Than Brand-new Ones? 57
Unit 6 61
Text A-1 The First Read 61
Text A-2 The Gift 64
Text B-1 Peanuts Creator Schulz Dies on Eve of Last Strip 67
Text B-2 Linda's New Friend 70
Unit 7 73
Text A-1 Starting Your Own Business 73
Text A-2 A Team Leader 75
Text B-1 Working for Fun and Profit 78
Text B-2 The Carpet Fitter 80
Unit 8 85
Text A-1 A Tree Project Helps the Genes of Champions Live On 85
Text A-2 Cloning 88
Text B-1 Engineers Ask Nature for Design Advice 91
Text B-2 Flowers in the Desert? 94
Appendix 99
Key to Comprehension Exercises 99