标签：大学英语四级真题,大学英语四级试题,
1991年1月大学英语四级考试完形附试题和答案,http://www.dxs89.com
Part IV Close (15 minutes)
Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
Albert Einstein is said to have been asked by a student, “what finding helped you most when you were __71__ the theory of relativity?” Einstein replied without __72__ moment’s hesitation. “Finding how to __73__ about the problem.”
The same __74__ is told about Sir Isaac Newton and __75__ other scientists. We have no proof __76__ any of these well-known conversations __77__ took place, but we are prepared to __78__ that they did, and, if so, that the __79__ was the same one Einstein gave, __80__ this is the “way scientists work __81__ science progresses.”
Scientists usually work toward models of the process of structure they are studying. __82__ we have models of the structure __83__ the universe and of the atom, models of the process __84__ which the genetic (遗传的) pattern is passed from one building block of life to __85__ models of the economic system and __86__ on. Some models are mathematical, but a __87__ does not have to have equations (方程) or even diagrams; the __88__ requirement is no doubt that it __89__ an insight (洞察) into the relationships that determine __90__ something works as it does or how it is put together.
71. A) designing
B) inventing
C) revealing
D) developing（D）
72. A) a
B) the
C) an
D) some（A）
73. A) know
B) learn
C) think
D) argue（C）
74. A) event
B) news
C) story
D) information（C）
75. A) any
B) more
C) few
D) several（D）
76. A) that
B) since
C) which
D) as（A）
77. A) naturally
B) actually
C) eventually
D) regularly（B）
78. A) forget
B) consider
C) believe
D) realize（C）
79. A) question
B) answer
C) conversation
D) topic（B）
80. A) although
B) because
C) unless
D) once（B）
81. A) while
B) or
C) and
D) but（C）
82. A) Otherwise
B) Nevertheless
C) Still
D) Thus（D）
83. A) of
B) in
C) with
D) over（A）
84. A) for
B) by
C) on
D) to（B）
85. A) either
B) other
C) both
D) another（D）
86. A) so
B) later
C) further
D) straight（A）
87. A) structure
B) pattern
C) process
D) model（D）
88. A) urgent
B) important
C) original
D) unnecessary（B）
89. A) provide
B) will provide
C) provided
D) is provided（A）
90. A) when
B) what
C) why
D) whether（C），1991年1月大学英语四级考试完形附试题和答案