Unit1
Text:Big Bucks the Easy Way
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Unit2
Text:Deer and the Energy Cycle
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Unit3
Text:Why Do We Believe That the Earth Is Round?
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REVISION EXERCISES1
Unit4
Text:Jim Thorpe
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Unit5
Text:To Lie or Not——The Doctor's Dilemma
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TEST YOURSELF:Test Paper1
Unit6
Text:How to Mark a Book
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Unit7
Text:The Luncheon
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Unit8
Text:The New Caves
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REVISION EXERCISES2
Unit9
Text:Journey West
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Unit10
Text:Why People Work
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TEST YOURSELF:Test Paper2
APPENDIX1: Key to Revision Exercises 1
Key to Revision Exercises 2
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