单选题 In a telephone survey of more than 2,000 adults, 21% said they believed the sun revolved(旋转)around the earth. An 1 7% did not know which revolved around 2 . I have no doubt that 3 all of these people were 4 in school that the earth revolves around the sun; 5 may even have written it 6 at test. But they never 7 their incorrect mental models of planetary (行星的) 8 because their everyday observations didn"t support 9 their teachers told them: People see the sun moving 10 the sky as morning turns to night, and the earth seems stationary (静止的) 11 that is happening.
Students can learn the right answers 12 heart in class, and yet never combined them 13 their working models of the world. The objectively correct answer the professor accepts and the 14 personal understanding of the world can 15 side by side, each unaffected by the other.
Outside of class, the student continues to use the 16 model because it has always worked well 17 that circumstance. Unless professors address 18 errors in students" personal models of the world, students are not 19 to replace them with the 20 one.

【正确答案】 C

【答案解析】[解析] 语境词汇题。四个答案都有“额外”的意思，但各有偏重。A重在表达“过量、超过正常的部分”；B是“在一类事物之外的额外部分”；D是“外加的”。因此只有C答案符合本题要求：另外有7%的人不知道是谁绕着谁转。

【正确答案】 A

【答案解析】[解析] 语境词汇题。virtually“实际上地”；remarkably“很明显地”；ideally“理想地”；preferably“更适宜地”。从句意来看，只能选A。

【正确答案】 C

【答案解析】[解析] 语境词汇题。此句句意为：但他们不肯改变脑海里错误的行星运动模式。根据语义判断，只有motion符合句意。选项中position和location都是表示静止位置的词，而行星是在不断运动中的，因此不能选。

【正确答案】 B

【答案解析】[解析] 语法结构题。本题缺少一个介词，本句意为：人们看到太阳越过天际，因此有了日夜更替。能和天空搭配，并体现运动感的介词只有across。

【正确答案】 C

【答案解析】[解析] 语境词汇题。在课外，学生仍使用他们自己脑中的模型。A强调“私人的”；B指“个体的”；D前应为形容词性的人称代词；唯有C可以表达主观的“个人想法”之意。

【正确答案】 D

【答案解析】[解析] 语境词汇题。意为：除非教师指出学生世界观模式中的某个错误，学生是不可能摒弃自己的观点，而认可正确观点的。由此可知，错误应是具体的，所以选D。