Unit 1 The Post Office 1
Unit 2 Introductions 6
Unit 3 The Tallest Grass 11
Unit 4 The Strange History of Ping-Pong 16
Unit 5 The World s Greatest Inventor 21
Unit 6 The Yellow River 26
Unit 7 Born to Communicate 31
Unit 8 Lend Me Your Ears 35
Unit 9 Where Tea-bush Came from 39
Unit 10 Fighting Fatty 44
Unit 11 Mark Twain as a Speaker 48
Unit 12 Can I Live to Be 150？ 52
Unit 13 Break the Ice 58
Unit 14 Two ways of Looking at Life 64
Unit 15 An Insight Changes Your Whole Life 68
Unit 16 What Is the Meaning of Life？ 73
Unit 17 Avoid Being Rude in Conversation 77
Unit 18 Selling by Asking Questions 81
Unit 19 Guam 84
Unit 20 What Are Black Holes？ 89
Unit 21 Learning English in the USA 93
Unit 22 A Walk in Space 98
Unit 23 Types of American Families 103
Unit 24 Bears and Bulls 108
Unit 25 Nonverbal Communication 113
Key to Comprehension Questions 118
英语音标 125