CONTENTS 1
Unit 1 Never Trust Appearance 1
Unit 2 How Stanley Found Livingstone 9
Unit 3 Icarus 16
Unit 4 The Gift of Fire 23
Unit 5 Death of a Gull 31
Unit 6 The Left-footed Thief 38
Unit 7 Disaster in Dayton 45
Unit 8 Pesos in the Sea 52
Unit 9 Ace of Aces 59
Unit 10 Early Days of the Mail 66
Unti 11 Why We Walk in Circles 73
Unit 12 He Led a Useful Life 80
Unit 13 California's Giants 87
Unit 14 Man Hunters of the U.S.A 94
Unit 15 The Vanished City 101
Unit 16 The Little People 108
Unit 17 Which Was Witch 116
Unit 18 Postmen with Feathers 124
Unit 19 Traveling in the Jungle 131
Unit 20 The Cowboy's Bandanna 138
Unit 21 Mister Imagination 145
Unit 22 The Big Wind 152
Unit 23 Arctic Adventure 160
Unit 24 Emergency Jump 167
Unit 25 A Pound of Butter 174
Unit 26 Elsa Kills a Buffalo 181
UnSt 27 Harace Greeley 188
Unit 28 Looking Nice 195
Unit 29 Animal Education 220
Unit 30 Going Up…………………………………………………………？ 236
Unit 31 Tame Volcanoes…………………………………………………？ 236
Unit 32 The Beau Catcher………………………………………………？ 236
Unit 33 Why Study Math? 236
Unit 34 More People and More Products 244
Unit 35 Education Out of School 252
Unit 36 Useful Companions 260
Answer Key 268