经验之谈 1
Unit One The Twins Day Festival 1
Unit Two Bees 9
Unit Three Lions at Work and Play 17
Unit Four A Giraffe 26
Unit Five The Neighbors' Bog 34
Unit Six Potatoes 43
Unit Seven Delicacies 52
Unit Eight Paris 60
Unit Nine The Statue of Liberty 69
Unit Ten Changes on the Farm 77
Unit Eleven Niagara Falls 86
Unit Twelve Hawaii,Island State 95
Unit Thirteen The Flag 105
Unit Fourteen An Accident in the Fog 115
Unit Fifteen George Washington 125
Unit Sixteen I Have a Dream 134
Unit Seventeen Shopping Malls 144
Unit Eighteen Our Changing Diet 154
Unit Nineteen Fast Food 164
Unit Twenty The Year I Was Unemployed 173
Unit Twenty-One Maple Syrup 185
Unit Twenty-Two The Computer Age 194
Unit Twenty-Three Cities in the 21st Century 204
Unit Twenty-Four Learning about Earthquakes 214
Unit Twenty-Five Why So Many More Americans Die in Fires 225
Unit Twenty-Six National Parks 237
Unit Twenty-Seven An Event That Has Influenced Me 247
Unit Twenty-Eight Language and Language 257
Unit Twenty-Nine Foreign Students in the United Stated and Canada 268
Unit Thirty The United Nations 278
Answer Keys 288
附录I 超纲词汇注释 299
附录II 符号与缩略语表 317
附录III 本书主编近年来出版的主要著作 318