But the survey found that cost could be a big influence.Fifty­five percent said they would choose e­textbooks if using them meant their textbook

　　rental fee would not increase.

　　Roger Von Holzen heads the Center for Information Technology in Education.He tells us that administrators are disappointed with the e­textbooks now available because the majority are not interactive(交互的)．

　　He thinks growth will come when more digital books include video，activities, games and other ways to interact with the information.But for now，most of the books are just words on a screen.

　　【解题导语】 本文主要是将传统的课程资料和电子教材进行比较，哪一种更好呢？看看文中是怎么说的。

　　1．The underlined word“them”in the fourth paragraph refers to________.

　　A．university students

　　B．textbooks and course materials

　　C．lap top computers

　　D．e­textbooks

　　答案　D　[词义推断题。第四段第一句提出问题“So what do students think of e­textbooks？”可知，后面的them指代的是e­textbooks。故选D。]

　　2．We can learn from the passage that________.

　　A．it is against law to share e­textbooks among students

　　B．students in Missouri State University can't afford to buy textbooks

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