问题
单项选择题
Passage One
If teachers want to find out if their students wrote their own papers, they ______.
A．ask other teachers to read their students’ papers
B．ask their students to list their sources of information
C．can sign up for the Internet service
D．search the Internet and compare papers
答案
参考答案：C
解析：
[分析]： 推理判断题。 根据原文可知，教师可在网站www.plagiarism.com注册，那么Within 24 hours they know if the student did the work 即24小时以内他们就会知道作业是否是学生们自己完成的。由此可推测若教师想知道作业是否是学生自己完成的，可以注册该网站由其提供服务。由此可见，C项内容与原文意思相符，是正确的。[解题关键] 掌握上下文内在逻辑是解题的关键。