1. A. they are not rescued once a new edition comes out

　　2. B. They haven’t fixed all the shortcomings of print books.

　　3. A. they find it troublesome to take notes with an iPad.

　　4. D. they are no more than print versions put on a screen

　　5. C. a platform for building multimedia content

　　6. A. share his learning experience with the best and brightest thinkers

　　7. C. professors can join in students’ online discussions

　　8. manpower to put together each one

　　9. cost

　　10. remains to be seen

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