1. Many ecologists believe that lots of major species in the world are on the________ of extinction.(05/01)
A) margin                                   B) border
C) verge                                      D) fringe

2. Any salesperson who sells more than the weekly ________ will receive a bonus.(05/01)
A) ratio                                      B) quota
C) allocation                               D) portion

3. He suggested that we put the scheme into effect, for it is quite_____.(04/01)
A) probable                                 B) sustainable
C) feasible                                   D) eligible

4.This book is about how these basic beliefs and values affect important_____ of American life.(04/01)
A) facets                                    B) formats
C) formulas                                 D) fashions

5.It is one thing to locate oil, but it is quite another to _____ and transport it to the industrial centers.(04/01)
A) permeate                                  B) extract
C) distinguish                               D) concentrate

6. Students are expected to be quiet and _____ in an Asian classroom.(04/01)
A) obedient                                  B) overwhelming
C) skeptical                                 D) subsidiary

7. Our reporter has just called to say that rescue teams will _____ to bring out the trapped miners.(04/01)
A) effect                                       B) affect