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 lsn't What lt Used to Be
Unit 2
TextA-1 Frederick Douglass
TextA-2 Best of Friends，Worlds Apart
TextB-1 Coming to an Awareness of Language
TextB-2 She Wanted to Teach
Unit 3
Text A-1 Brave New World of Biometrics
Text Ao2 Fingerprints Instead of Credit Cards
Text B-1 Black Box Tells Its Secrets
Text B-2 The Deli
Unit 4
TextA-1 Everything Equals E=mc2
TextA-2 Black Holes
TextB-1 The Cosmos
TextB-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
TextA-1 The First Read
TextA-2 The Gift
TextB-1 Peanuts Creator Schulz Dies on Eve of Last Strip
TextB-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
TextA-1 Atree Project Helps the Genes of Champions Live On
TextA-2 Cloning
TextB-1 Engineers Ask Nature for Design Advice
TextB-2 Flowers in the Desert?
Appendix
Key to Comprehension Exercises
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