6.Nations are _____ as “aged” when they have 7 per cent or more of their people aged 65 or above.

　　A. limited B. classified C. originated D. processed

　　7.It is touching to see how a cat or dog - especially a dog - _____ itself to family and wants to share in all its goings and comings.

　　A. attributes B. applies C. assigned D. attaches

　　8.She was more _____ than frightened.

　　A. surprising B. interested C. hated D. surprised

　　9.The attention of the public was continually _____ to new possibilities in scientific fields and the discovery of new knowledge.

　　A. applied B. drawn C. referred D. thrown

　　10.Few， _____ any，live their lives without some degree of unhappiness and suffering.

　　A. like B. except C. if D. when

　　11.Many women are too concerned _____ staying thin and they believe that vitamins are some kind of magic cure to replace food.

　　A. of B. by C. with D. on

　　12.In education， there should be a good balance among the branches of knowledge that contribute _____ effective thinking and wise judgment.

　　A. at B. in C. for D. to

　　13. _____ the numbers in employment， the hotel industry was the second largest industry in this country last year.

　　A. In line with B. In terms of C. In accordance with D. In proportion to

　　14.Air travel is so quick nowadays that we can leave London after breakfast and arrive in New York ____ eight hours.

　　A. in B. for C. after D. until

　　15.It is also true that the effect of a drug is much _____ upon youngsters than adults.

　　A. bigger B. fewer C. greater D. little

　　16.Because the reading _____ in most college courses are very heavy， students should plan to read every day.

　　A. assignments B. schedules C. activities D. programs

　　17.For long-time efficiency and happiness it is best to observe the _____ of health and sound working conditions.

　　A. principles B. ideas C. elements D. factors

　　18. _____ their differences， they fell passionately in love with each other.

　　A. As for B. Owing to C. Despite D. Through

　　19. _____ yourself to the job in hand， and you‘ll soon finish it.

　　A. Reply B. Imply C. Apply D. Supply

　　20.This will not only keep the study habit alive but also keep you up to ___ on your class assignments and projects.

　　A. day B. date C. number D. time

　　21.I can‘t _____ the meaning of his poem because it’s too vague.

　　A. turn out B. put out C. figure out D. look out

　　22.Some people think that animal research is irrelevant _ our health and that it can often produce misleading results.

　　A. with B. at C. on D. to

　　23. These networks are on the _____ for warning signs that show the weakening of rock layers that can precede an earthquake.

　　A. eagerness B. alarm C. alert D. guard

　　24. _____ it was raining， many international tourists were having picnics in the woods.

　　A. In spite B. In spite of

　　C. In spite of that D. In spite of the fact that