Lesson 1 Matter 1
Grammar:Kinds of Verbs 5
Can May Must 6
Lesson 2 A Phone Conversation 11
Grammar:The Future Indefinite Tense 16
Lesson 3 The Monkey and the Crocodile 20
Grammar:The Past Indefinite Tense 25
Lesson 4 The Sun 31
Grammar:The Degrees of Comparison of Adjectives（Ⅰ） 36
Lesson 5 London and New York 42
Grammar:The Degrees of Comparison of Adjectives（Ⅱ） 47
The Degrees of Comparison of Adverbs 48
Lesson 6 Mary Is Late Again（Ⅰ） 53
Grammar:"Will"and"To be going to" 57
Lesson 7 Mary Is Late Again（Ⅱ） 62
Grammar:The Past Continuous Tense 67
Lesson 8 A Question of Pronunciation 71
Grammar:Members of the Sentence（Ⅰ） 75
Lesson 9 Nathan Hale 82
Grammar:Members of the Sentence（Ⅱ） 88
The Object Clause 89
The Predicative Clause 89
Lesson 10 The Air Around Us 95
Grammar:The Adverbial Clause 99
Lesson 11 Where Did Americans Come From? 104
Grammar:The Present Perfect Tense（Ⅰ） 109
Lesson 12 Farmers and Farming in the U.S 116
Grammar:The Present Perfect Tense（Ⅱ） 120
Lesson 13 Dustmen on Strike 127
Lesson 14 The Moon 136
Lesson 15 Labour and Man 143
Lesson 16 The Blind Men and the Elephant 151
Lesson 17 Look Carefully and Learn 161
Grammar:The Attributive Clause（Ⅰ） 164
Lesson 18 Thomas Edison,the Inventor（Ⅰ） 172
Grammar:The Attributive Clause（Ⅱ） 175
Lesson 19 Thomas Edison,the Inventor（Ⅱ） 182
Lesson 20 Abraham Lincoln 190
Vocabulary 201
Irregular Verbs 228