Book One 1
Unit One How to Improve Your Study Habits 1
Unit Two Sailing Round the World 20
Unit Three The Present 39
Unit Four Turning off TV：A Quiet Hour 54
Unit Five A Miserable，Merry Christmas 69
Unit Six Sam Adams，Industrial Engineer 87
Unit Seven The Sampler 109
Unit Eight You Go Your Way， I’ll Go Mine 123
Unit Nine The Brain 140
Unit Ten Going Home 161
Book Two 181
Unit One Is There Life on Earth？ 181
Unit Two The Dinner Party 203
Unit Three Lessons from Jefferson 222
Unit Four My First Job 249
Unit Five The Professor and the Yo-Yo 267
Unit Six The Makings of a Surgeon 287
Unit Seven There’s Only Luck 306
Unit Eight Is It Going out of Style？ 325
Unit Nine What Is Intelligence， Anyway？ 343
Unit Ten Profits of Praise 357
Book Three 375
Unit One A Brush with the Law 375
Unit Two The Woman Who Would Not Tell 394
Unit Three Why I Teach 405
Unit Four Lady Hermits Who Are Down But Not Out 419
Unit Five The Day Mother Cried 433
Unit Six A Day’s Wait 450
Unit Seven The Shelter 467
Unit Eight Daydream a Little 486
Unit Nine The Death of Hitler 502
Unit Ten The Fantastic Spurt in Technology 518
Book Four 536
Unit One Big Bucks the Easy Way 536
Unit Two Deer and the Energy Cycle 564
Unit Three Why Do We Believe That the Earth Is Round？ 588
Unit Four Jim Thorpe 612
Unit Five To Lie or Not to Lie——The Doctor’s Dilemma 639
Unit Six How to Mark a Book 667
Unit Seven The Luncheon 684
Unit Eight The New Caves 704
Unit Nine Journey West 719
Unit Ten Why People Work 733