Unit 1 TWINS,GENES,AND ENVIRONMENT 1
Unit 2 YOU NEED MORE THAN A TYPEWRITER 11
Unit 3 The"Dream Mile"Becomes Reality 21
Unit 4 THE KAS FOR EZIER SPELING 31
Unit 5 What Do Americans Think? 41
Unit 6 AFRICA:Land of Problems and Promises 51
Unit 7 THE GREATEST TREASURE HUNT 62
Unit 8 Life on Other Planets 74
Unit 9 WHY I LOVE WISCONSIN 84
Unit 10 ACROSS THE SEA OF STARS 94
Unit 11 THE LOST HALF-CENTURY 104
Unit 12 THE DEATH OF A LONE OAK 114
Unit 13 OUR FIRST CONGRESSWOMAN 124
Unit 14 FORTUNE IS FICKLE 135
Unit 15 YOUR VOICE GIVES YOU AWAY 145
Unit 16 NEW BABIES ARE SMARTER THAN YOU THINK 157
Unit 17 A KILLER IS BORN 168
Unit 18 SONS OF THE SUN 179
Unit 19 ENGLISH FOR AMERICANS 190
Unit 20 FASHIONS IN FOOD 202
Unit 21 WHO DECIDES,READERS OR CRITICS? 214
Unit 22 THE ETRUSCAN ENIGMA 226
Unit 23 THE PURPOSE OF THE REPUBLIC 237
Unit 24 THE FLU:SURE NUISANCE,POSSIBLE DISASTER 249
Unit 25 The Realistic Idealist 260
Unit 26 A JAZZ TRADITION 272
Unit 27 Da Vinci's Greatest Triumph 284
Unit 28 MODERN MAN IS OBSOLETE 297
Unit 29 FLOWERING OF AMERICAN MUSIC 309
Unit 30 THE STRUGGLE FOR THE WORLD 322
