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51. As a matter of fact, what impressed me most is Einstein's _____, but not his photoelectric theory for which he won the Nobel Prize.
A. character
B. temper
C. quality
D. personality

52. Closed-circuit televisions make it easy for a large number of students to see everything a teacher _____.
A. illuminates
B. reveals
C. demonstrates
D. revises

53. It is generally agreed that economic controls can _____ inflation by preventing overt wage and price increases from taking place.
A. suppress
B. impress
C. compress
D. express

54. If our company wants to make a©ú©úprofit, we have to make great efforts to reduce the loss of _____ materials.
A. raw
B. primitive
C. tough
D. original

55. The extrovert loves crowds; _____, the introvert is fond of solitude.
A. differently
B. by contrast
C. otherwise
D. in contrast

56. Sometimes we have to _____ chunks of information into manageable portions.
A. break out
B. breaking into
C. break down
D. breaking down

57. Generally speaking, young people have a greater interest in technical innovation, since they don't have _____ ideas.
A. deceptive
B. jealous
C. preconceived
D. stale

58. Do you want to fly first or ______class?
A. economic
B. economical
C. economy
D. economics

59. Since the two countries couldn't _____ their differences, they decided to declare war on each other.
A. resign
B. renew
C. recover
D. restore

60. After all, the food crisis is over and the wood will _____ its long-term upward trend in agriculture production.
A. resume
B. renew
C. recover
D. restore

31. ACDDA 36. CACDB 41. DCDCD 46. CAADB 51. DCAAB 56. CCBBD