前言
经验之谈
Unit One-Unit Thirty
Unit One The Twins Day Festival
Unit Two Bees
Unit Three Lions at Work and Play
Unit Four A Giraffe
Unit Five The Neighbors' Dog
Unit Six Potatoes
Unit Seven Delicacies
Unit Eight Paris
Unit Nine The Statue of Liberty
Unit Ten Changes on the Farm
Unit Eleven Niagara Falls
Unit Twelve Hawaii, Island State
Unit Thirteen The Flag
Unit Fourteen An Accident in the Fog
Unit Fifteen George Washington
Unit Sixteen I Have a Dream
Unit Seventeen Shopping Malls
Unit Eighteen Our Changing Diet
Unit Nineteen Fast Food
Unit Twenty The Year 1 Was Unemployed
Unit Twenty—One Maple Syrup
Unit Twenty—Two The Computer Age
Unit Twenty—Three Cities in the 21st Century
Unit Twenty—Four Learning about Earthquakes
Unit Twenty—Five Why So Many More Americans Die in Fires
Unit Twenty—Six National Parks
Unit Twenty—Seven An Event That Has Influenced Me
Unit Twenty—Eight Language and Languages
Unit Twenty—Nine Foreign Students in the United States andCanada
Unit Thirty The United Nations
Answer Keys
附录Ⅰ 超纲词汇注释
附录Ⅱ 符号与缩略语表
附录Ⅲ 本书主编近年来出版的主要著作