9 The Constitutions vague nature has given it the flexibility to be adapted when circumstances change.

　　A imprecise B apparent

　　C clear 13 easy

　　10 Gambling is lawful in Nevada.

　　A enjoyable B irresistible

　　C legal D profitable

　　11 These are the motives for doing it.

　　A reasons B excuses

　　C answers D replies

　　12 The river widens considerably as it begins to turn west.

　　A extends B stretches

　　C broadens 13 bends

　　13 Many economists have given in to the fatal lure of mathematics.

　　A error B puzzle

　　C attraction D contradiction

　　14 With immense relief I stopped running.

　　A no B little

　　C scarce D enormous

　　15 A great deal has been done to remedy the situation

　　A maintain B improve

　　C preserve D protect

　　參考答案1. C 2. B 3. D 4. D 5. B6. A 7. D 8. B 9. A 10. C11. A 12. C 13. C 14. D 15. B