SECTION 3 Error Correction
This section consists of 15 sentences; in each sentence there is a part given in the brackets that indicates a grammatical error. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase that can replace the part so that the error is corrected. There is only ONE right answer.
We learned that Columbus has discovered America in 1492.
A. had discovered
B. discovers
C. discovered
D. was discovering
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The topic sentence of Paragraph 3 is ______ .
A. at the beginning of this paragraph
B. at the end of this paragraph
C. in the middle of this paragraph
D. Both A and B
The word "it" underlined in Paragraph 3 most probably means ______ .
A. Mozart's correspondence
B. the collection of Mozart's music
C. the power that drove Mozart
D. Mozart's life and death
内在经济是指()。
A. 一个企业在生产规模扩大时由自身内部所引起的产量增加
B. 一个企业在生产规模扩大时由自身内部所引起的产量或收益减少
C. 一个行业的大对其中每个企业带来的产量或收益的增加
D. 整个社会经济的发展给一个企业所带来的产量或收益的增加
We have to filter sensory input into recognizable images because ______ .
A. it's impossible for us to process all the existing visual information
B. what we perceive has to be significant
C. we have to look at a face in complex shadows
D. different cultures emphasize different perceptions
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