Unit One Is There Life on Earth？ 1
Unit Two The Dinner Party 13
Unit Three Lessons from Jefferson 25
Unit Four My First Job 39
Unit Five The Professor and the Yo-Yo 51
Unit Six The Making of a Surgeon 62
Unit Seven There's Only Luck 74
Unit Eight Honesty:Is It Going out of Style？ 88
Unit Nine What Is Intelligence,Anyway？ 99
Unit Ten Profits of Praise 111
Appendix Key to Model Tests 124