Unit One Big Bucks the Easy Way(轻轻松松赚大钱) 1
Unit Two Deer and the Energy Cycle(鹿和能量循环) 16
Unit Three Why Do We Believe That the Earth is Round?(我们为什么相信地球是圆的？) 28
Unit Four Jim Thorpe(吉姆·莱普) 43
Unit Five To Lie or Not to Lie-The Doctor s Dilemma(是否撒谎--医生的难题) 57
Test Paper1(答案及分析) 70
Unit Six How To Mark A Book(如何在书上做记号) 74
Unit Seven The Lunchen(午餐) 89
Unit Eight The New Caves(新洞穴) 105
Unit Nine Journey West(西行记事) 119
Unit Ten Why People Work(人为什么工作) 132
Test Paper 2(答案及分析) 146