Introduction 前言
1. A Difficult Question
2. The Hole in the Ground
3. Quick Thinking
4. The New Doctor
5. A Cheap Meal
6. Not a Small Problem
7. The Package
8. A Sad Story
9. The Best Salesman in the World
10. Your Need is Greater Than Mine
11. A Very Important Person
12. Violin Lessons
13. Not So Stupid
14. No Elephants
15. How Wars Begin
Answer Key 答案
