Unit One Learning English 1
Reading Selection 1
Language Structure 11
Words and Sentences（词和句子） 11
Practice and Improvement 17
Unit Two The Things around Us 30
Reading Selection 30
Language Structure 37
The Adverbial Clause（状语从句） 37
Practice and Improvement 41
Unit Three Space Travel 53
Reading Selection 53
Language Structure 62
The Attributive Clause（定语从句） 62
Practice and Improvement 66
Unit Four Words and Their Stories 80
Reading Selection 80
Language Structure 89
The Noun Clause（名词从句） 89
Practice and Improvement 94
Revision Ⅰ 106
Unit Five Twenty Questions 115
Reading Selection 115
Language Structure 125
The Modal Verbs（情态动词） 125
Practice and Improvement 130
Unit Six Fables about Mice 143
Reading Selection 143
Language Structure 152
The Infinitive（不定式） 152
Practice and Improvement 157
Unit Seven Stories about Thomas Edison 169
Reading Selection 169
Language Structure 178
The Participle（分词） 178
Practice and Improvement 183
Unit Eight Life in the Countryside 196
Reading Selection 196
Language Structure 205
The Gerund（动名词） 205
Practice and Improvement 210
Revision Ⅱ 223
Appendixes 231
Appendix Ⅰ Irregular Verbs 231
Appendix Ⅱ Presupposed Words and Phrases 234
Appendix Ⅲ Glossary 242