单项选择题

Out of 300 papers checked for fakes, ______.

A．255 were originals
B．45 were originals
C．85% were fakes
D．155 were originals
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单项选择题
Instead of researching and writing their papers, some students ______.
A．ask other students to write their papers
B．draw pictures instead
C．copy from reference books
D．copy papers or large parts of papers from the Internet
单项选择题
Using the program developed at University of California at Berkeley, the papers are checked by using ______.
A．printing and looking carefully at hundreds of papers on the Internet
B．a search of many web pages and a comparison of words used
C．asking the student where they got the information in the paper
D．comparing all the papers which are turned in by the students
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