51. As you have seen, the values of a nation's currency is a _____ of its economy.
A) reaction
B) reflection
C) response
D) revelation
正确答案是

52. In the Spring Export Commodities Fair the ______ of fine china attracted much attention
of customers from all over the world.
A) succession
B) array
C) string
D) procession
正确答案是

53. We should make a clear _______ between the two scientific terms for the purpose of our
discussion.
A) separation
B) discrimination
C) deviation
D) distinction
正确答案是

54. The terrorists might have planted a bomb on a plane in Athens, set to ______ when it
arrived in New York.
A) go off
B) get off
C) come off
D) carry off
正确答案是

55. We should be able to do the job for you quickly, ______ you give us all the necessary
information.
A) in case
B) provided that
C) or else
D) as if
正确答案是

56. The younger person's attraction to stereos cannot be explained only _____ familiarity
with technology.
A) in quest of
B) by means of
C) in terms of
D) by virtue of
正确答案是

57. Attempts to persuade her to stay after she felt insulted were ______.
A) in no way
B) on the contrary
C) at a loss
D) of no avail
正确答案是

58. By signing the lease we made a _______ to pay a rent of '150 a week.
A) conception
B) commission
C) commitment
D) confinement
正确答案是

59. To prevent flooding in winter the water flowing from the dam is constantly ______ by a
computer.
A) graded
B) managed
C) conducted
D) monitored
正确答案是

60. Many people think of deserts as _____ regions, but numerous species of plants and animals have adapted to life there.
A) virgin
B) barren
C) void
D) wretched
正确答案是