UNIT ONE THE THINGS AROUND US 1
Text Ⅰ Clouds,Fog,Rain and Rainbows 1
Text Ⅱ Snow,Sleet,Hail and Ice 2
Reading Comprehension 7
Grammar:The Adverbial Clause 9
Exercises 13
Supplementary Readings:Ⅰ．Air,Wind,Thunder and Lightning 16
Ⅱ．Water 18
Cloze Procedure:The Story of a Raindrop 20
UNIT TWO SPACE TRAVEL 23
Text Ⅰ Some Strange Journeys 23
Text Ⅱ The First Space Travelers 24
Reading Comprehension 29
Grammar:The Attributive Clause(Ⅰ) 32
Exercises 35
Supplementary Readings:Ⅰ．Some Facts About the Moon 40
Ⅱ．Journey to the Moon 43
Cloze Procedure:Landing onthe Moon 46
UNIT THREE THE WORLD OF ANIMALS 49
Text Ⅰ Elephant 49
Text Ⅱ The Asian and the Afric an Elephants 50
Reading Comprehension 56
GrammarThe Attributive Clause(Ⅱ) 59
Exercises 61
Supplementary Readings:Ⅰ．Man's Best Friend 67
Ⅱ．Two Stories About Monkeys 69
Cloze Procedure:The Elephant Which Did Never Forget 72
UNIT FOUR WORDS AND THEIR STORIES 75
Text Ⅰ Okay 76
Text Ⅱ Indian 77
Reading Comprehension 84
Grammar:The Noun Clause 87
Exercises 91
Supplementary Readings:Ⅰ．To Face the Music 97
Ⅱ．Yankee 99
Cloze Procedure:Christopher Columbus 102
UNIT FIVE A LANGUAGE GAME 105
Text Ⅰ Twenty Questions(Ⅰ) 105
Text Ⅱ Twenty Questions(Ⅱ) 107
Reading Comprehension 113
Grammar:The Modal Verbs 115
Exercises 121
Supplementary Readings:Ⅰ．Twenty Questions(Ⅲ) 127
Ⅱ．Twenty Questions(Ⅳ) 130
Cloze Procedure:A Dialogue 133
UNIT SIX LEARNING ENGLISH 136
Text Ⅰ The Importance of English 136
Text Ⅱ The Study of English 138
Reading Comprehension 146
Grammar:The Word Formation 149
Exercises 153
Supplementary Readings:Ⅰ．Building Vocabulary as You Study 160
Ⅱ．Learn to Speak Good English 164
Cloze Procedure:A Letter to a Professor 166
IRREGULAR VERBS 169
VOCABULARY 174
IDIOMS AND EXPRESSIONS 187