8 In the background was that eternal hum

　　A long

　　B never-ending

　　C boring

　　D extensive

　　9 The Constitution’s vague nature has given it the flexibility to be adapted when circumstances change

　　A imprecise

　　B apparent

　　C clear

　　D 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

　　D 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