CONTENTS 1
Lesson 1．Education Today 1
Sentence Elements 10
Lesson 2．Ho w Yu Kung Re moved the Mountains 10
Word Order and"There is" 21
Lesson 3．The Story of Light 21
Some Common Prepositions and Their Uses 33
Lesson 4．What Is Heat? 33
Prepositional Phrases 45
Independent Reading 1:Doing Physical Labour with Lenin 45
Word-Formation（Ⅰ） 50
Review Exercises（Lesson 1-Lesson 4） 52
Lesson 5New Methods of Computation 55
The Tenses—The Indefinite TensesThe Voice 70
Lesson 6．Science in Action 70
The Continuous Tenses—The Present and Past Continuous TensesIndependent Reading 2:China's First Atomic Reactor and Cyclotron 81
Lesson 7．The World's First Compass 83
The Perfect Tenses—The Present and Past Perfect TensesReview Exercises（Lesson 5—Lesson 7） 97
Lesson 8．M．V．Lomonosov 100
The Verbals—The Infinitive 113
Independent Reading 3:Motions of the Moon 113
Word-Formation（2） 116
Lesson 9Work and Rest（An Excerpt） 117
The Verbals—The Gerund and the Parti-ciple 132
Lesson 10．A Letter to the Youth 132
Independent Reading 4:"This Belongs to Chu Teh" 142
Word-Formation（3） 146
Supplementary Readings 147
1．A Few Things about Karl Marx 147
2．Water 148
3．Atomic Energy 149
Reference Material of Phonetics 151
An Outline of Grammar 166
Irregular Verbs 171
Vocabulary 174