UNIT ONE FABLES ABOUT MICE 1
Text Ⅰ The Mouse King Marries His Daughter 1
Text Ⅱ A Mice's Meeting 2
Reading Comprehension 9
Grammar:The Infinitive 12
Exercises 18
Supplementary Rsadings:Ⅰ．A Mouse and Two Cats 24
Ⅱ．The Bilingual Mouse 27
Close Procedure:The Town Mouse and the Country Mouse 29
UNIT TWO STORIES ABOUT THOMAS EDISON 32
Text Ⅰ The World's GreatestInventor 32
Text Ⅱ Talking Tinfoil 34
Reading Comprehension 41
Grammar:The Participle 43
Exercises 49
Supplementary Readings:Ⅰ．A safe and Bright Light 56
Ⅱ．Light for the City 59
Cloze Procedure:Edison's Inventions 62
UNIT THREE THE LIFE IN THE COUNTRYSIDE 65
Text Ⅰ The modern Farmer 65
Text Ⅱ Machanized Farming 67
Reading Comprehension 73
Grammar:The Gerund 75
Exercises 80
Supplementary Readings:Ⅰ．Farm Life in the United States 86
Ⅱ．Country Living 89
Cloze Procedure:Fighting Against Harmful Insects with Insects 93
UNIT FOUR ENERGY 95
Text Ⅰ What Is Our Main Source of Energy? 95
Text Ⅱ How to Deal with Atomic Waste 98
Reading Comprehension 106
Grammar:The Subjunctive Mood 108
Exercises 114
Supplementary Readings:Ⅰ．Atomic Energy 120
Ⅱ．Energy Sense Makes Future Sense 124
Cloze Procedure:Using the Sun 128
UNIT FIVE THE THINGS UNKNOWN TO YOU 131
Text Ⅰ How Doesa Homing Pigeon Find Its Nest? 131
Text Ⅱ How Do Animals Know When an Earthquake Is Coming? 133
Reading Comprehension 141
Crammar:The Use of“It” 143
Exercises 146
Supplementary Readings:Ⅰ．How Do Birds Find Their Way Home? 151
Ⅱ．Are There Any Real Monsters? 154
Cloze Procedure:The Migrating Birds 157
UNIT SIX COMPUTERS CONCERN YOU 159
Text Ⅰ Computers:Machines That Can Think 159
Text Ⅱ Hello,I'm Doctor Computer 161
Reading Comprehension 169
Grammar:Inversion 172
Exercises 176
Supplementary Readings:Ⅰ．Calculators and Computers 183
Ⅱ．Computers Concern You 186
Cloze procedure:The Use of Computers 191
VOCABULARY 194
IDIOMS AND EXPRESSIONS 210