Unit1 Big Bucks the Easy Way 1
Unit2 Deer and the Energy Cycle 17
Unit3 Why Do We Believe That the Earth Is Round 32
Unit4 Jim Thorpe 49
Unit5 To Lie or Not to Lie-The Doctor s Dilemma 65
Unit6 How to Mark a Book 82
Unit7 The Luncheon 97
Unit8 The New Caves 115
Unit9 Journey West 133
Unit10 Why People Work 150
课文参考译文 168