Unit One Is There Life on Earth？ 1
Unit Two The Dinner Party 14
Unit Three Lessons from Jefferson 27
Unit Four My First Job 44
Unit Five The Professor and the Yo-Yo 60
Unit Six The Making of a Surgeon 75
Unit Seven There’s only Luck 90
Unit Eight Honesty：Is It Going out of Style？ 103
Unit Nine What Is Intelligence，Anyway？ 119
Unit Ten Profits of Praise 132