11. The ________ of the scientific attitude is that the human mind can suceeed in understanding the universe.

　　A) essence

　　B) texture

　　C) content

　　D) threshold

　　12. The old lady has developed a ________ cough which cannot be cured completely in a short time.

　　A) perpetual

　　B) permanent

　　C) chronic

　　D) sustained

　　13. What the correspondent sent us is an ________ news report. We can depend on it.

　　A) evident

　　B) authentic

　　C) ultimate

　　D) immediate

　　14. Having had her as a professor and adviser, I can tell you that she is an _______ force who pushes her students to excel far beyond their own expectations.

　　A) inspirational

　　B) educational

　　C) excessive

　　D) instantaneous

　　15. Some researchers feel that certain people have nervous systems particularly ______ to hot, dry winds. They are what we call weather sensitive people.

　　A) subjective

　　B) subordinate

　　C) liable

　　D) vulnerable

　　16. Hurricanes are killer winds, and their ________ power lies in the physical damage they can do.

　　A) cumulative

　　B) destructive

　　C) turbulent

　　D) prevalent

　　17. In some countries, students are expected to be quiet and ________ in the classroom.

　　A) skeptical

　　B) faithful

　　C) obedient

　　D) subsidiary

　　18. In spite of the ______economic forecasts, manufacturing output has risen slightly.

　　A) gloomy

　　B) miserable

　　C) shadowy

　　D) obscure

　　19. Body paint or face paint is used mostly by men in pre?literate societies in order to attract good health or to _______ disease.

　　A) set aside

　　B) ward off

　　C) shrug off

　　D) give away

　　20. The international situation has been growing _____difficult for the last few years.

　　A) invariably

　　B) presumably

　　C) increasingly

　　D) dominantly