UNIT 1 Big Bucks the Easy Way 1
UNIT 2 Deer and the Energy Cycle 13
UNIT 3 Why Do We Believe That the Earth Is Round? 22
UNIT 4 Jim Thorpe 32
UNIT 5 To Lie or Not to Lie—The Doctor's Dilemma 43
UNIT 6 How to Mark a Book 54
UNIT 7 The Luncheon 64
UNIT 8 The New Caves 74
UNIT 9 Journey West 84
UNIT 10 Why People Work 93
Appendix 1:Key to Exercises(UNIT 1-UNIT 10) 104
Appendix 2:Chinese Translations of the Texts(UNIT 1-UNIT 10) 140
Appendix 3:Chinese Translations of the Reading Passages(UNIT 1-UNIT 10) 158