CONTENTS 1
Lesson 1 Text:How to Study English 1
Phonetics:Phonemes,Syllables and Accents（Primary,Secondary） 3
Lesson 2 Text:Try,Try Again 8
Phonetics:Intonation 11
Lesson 3 Text:Counting and Measuring in Old Times 17
Grammar:Present,Past,Future Indefinite Tenses 20
General Review 1 27
Lesson 4 Text:Scientists'Language 33
Supplementary Reading:A Dialogue 37
Grammar:Number of Nouns,Possessive Case 38
Lesson 5 Text:Something about the Sun 44
Grammar:Degrees of Comparison of Adiectives 48
Lesson 6 Text:Motion of Sound 53
Supplementary Reading:Velocity of Sound 57
Grammar:Degrees of Comparison of Adverbs 59
General Review 2 62
Lesson 7 Text:Tomorrow Is with Us 68
Grammar:Present,Past,Future Continuous Tenses 73
Lesson 8 Text:Dreiser's Letter to William Z．Foster 81
Supplementary Reading:Our Faith in Victory 85
Grammar:Present Perfect Tense 87
Lesson 9 Text:A．S．Popov,the Inventor of Radio 93
Grammar:The Voice 97
General Review 3 104
Reading Material:The Air 108
Lesson 10 Text:Experiments in Physics 110
Supplementary Reading:Energy 113
Grammar:The Infinitive 115
Lesson 11 Text:Michael Faraday 121
GrammarThe Gerund 126
Lesson 12 Text:Power—An Important Factor of Productive Force 129
Supplementary Reading:Learn by Asking 134
Grammar:The Participle 135
Lesson 13 Text:Galileo and the Lamps 141
Grammar:Fractional Numerals,The Article 145
Lesson 14 Text:Electronic Computers 149
Supplementary Reading:Electronics and Its Applications 153
Grammar:Phrases,Clauses and Sentences;Simple,Compound,and Complex Sentences 155
General Review 4 160
Reading Material:Atomic Energy 164
Appendix Ⅰ Irregular Verbs 166
Ⅱ Idioms and Phrases 169
Ⅲ Vocabulary 170