【正确答案】
D
【答案解析】[听力原文] Online classes might revolutionize colleges the way the Internet has already changed music, publishing, sales and other businesses. Many top universities now offer online classes from computer programming to the science of cooking. Many classes are at little or no cost. And they are restructured more often than traditional college programs. At most colleges, a professor or teaching assistant gives a lecture to students, who then do research, study, and homework alone. However, according to what student and blogger John Haber says, online classes change everything around. 'They're watching the lectures, recording lectures at home as homework, and then when they get to class, they're having more active discussions or interactions with the teachers or working on projects.' John Haber said that he is taking enough online classes to earn a four-year college degree in just one year. Experts say the new technology will have a major effect on colleges. Some predict future classes may be a mix of online lectures and professors helping students work through difficult problems in person. A college marketing expert says competition from online schools, and concern about costs, will change universities. 'The consumer demands that you tell me why, give me a reason, to believe that my money, my tuition money is best spent at your institution. What is the return on my investment? What is your value proposition?' Top universities with strong public images may expand in an online world. But less famous schools may struggle to get the interest of students. What is one of the changes that online classes bring about?