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