5．
根据上下文提示完成对话
Mary: Look,Dad. The news says that e 一 book reading is increasing all the world.
Dad: It's an electronic copy of a book. It can be
downloaded (下载) from a webpage and stored on a computer.
Mary: Then what are the advantages of e 一 books over paper books?
Dad: There are many, dear. For example, no trees are
to make paper for the pages of e 一 books.
Mary: We don't have to go to a bookshop to buy them,
do we?
Dad: No, we don't. And e 一 books take up space. We can store thousands of e 一 books on a single computer,
Mary: Can e-books be used in the classroom?
Dad: Of course. You know, the cost of traditional
is always high.
Mary: Will paper books be replaced by e 一 books in the ?
Dad: Not sure. I think we will have both for &
long time.
