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.
In a telephone survey of more than 2，000 adults，21% said they believed the sun revolved (旋转) around the earth.An_71_7% did not know which revolved around_72_I have no doubt that_73_all o f these people were_74_in school that the earth revolves around the sun_75_may even have written it_76_at est.But they never_77_ their incorrect mental models of planetary (行星的) _78_because their every day observations didn’t support_79_their teachers told them: People see the sun “moving80the sky as
morning turns to night， and the earth seems stationary (静止的) _81_that is happening.Students can learn the right
answers_82_heart in class， and yet never combined them_83_their working models of the world.The objectively correct answer the professor accepts and the_84_personal understanding of the world Can_85_side by side， each unaffected by the other.
Outside of class， the student continues to use the86mod el be cause it has always worked well_87_that circumstance.Unless professors address_88_errors in students’personal models of the world， students are not_89_to replace them with the_90_one.
71. A) excessive B) extra C) additionalD) added
72. A) what B) which C) thatD) other
73. A) virtually B) remarkably C) ideally D) preferably
74. A) learned B) suggestedC) taught D) advised
75. A) thoseB) these C) who D) they
76. A) onB) with C) under D) for
77. A) formed B) altered C) believed D) thought
78. A) operation B) position C) motion D) location
79. A) how B) which C) thatD) what
80. A) around B) acrossC) on D) above
81. A) sinceB) so C) while D) for
82. A) toB) by C) in D) with
83. A) with B) into C) to D) along
84. A) adult’s B) teacher’sC) scientist’s D) student’s
85. A) existB) occur C) surviveD) maintain
86. A) private B) individualC) personal D) own
87. A) inB) with C) on D) for
88. A) general B) natural C) similarD) specific
89. A) obliged B) likelyC) probable D) partial
90. A) perfect B) betterC) reasonableD) correct
