It's no secret that paper textbooks are heavy. But what you may not know is that backpack weight is an increasing problem among kids. Studies show that heavy backpacks can lead to both chronic back pain and poor posture - and many kids are carrying a quarter of their body weight in textbooks.

Today's students have grown up completely immersed in technology. iPod, iPad, computer - these are the ways they interact with their world. They need a textbook made for the way they learn. iBooks textbooks on iPad offer a gorgeous, full-screen experience full of interactive diagrams, photos, and videos. No longer limited to static pictures to illustrate the text, now students can dive into an image with interactive captions, rotate a 3D object, or have the answer spring to life in a chapter review. They can flip through a book by simply sliding a finger along the bottom of the screen. Highlighting text, taking notes, searching for content, and finding definitions in the glossary are just as easy. And with all their books on a single iPad, students will have no problem carrying them wherever they go.

　　McGraw-Hill, Pearson Education, and Houghton Mifflin Harcourt - the publishers responsible for the majority of K-12 content in the US - have created Multi-Touch textbooks available now from the iBookstore

16.What's the function of the first paragraph?

　A. Introduce the dilemma of paper textbooks

　B. Attract the readers' attention

　C. Tell us the disadvantage of the textbook.

　D. Show the present appearance of the textbook.

17. What may be talked about in the following passage?

　A. What's the K-12 B. The textbook transformation.

　C. The use of the multi-Touch textbooks D. 3D Images

18. Which is the closed meaning of the word "tattered" ?

　A. tored B. ragged C. thrown D. used

19. i Books provide the following things EXCEPT .

　A. interactive diagrams B. rotated 3D objects

　C. gorgeous experience D static pictures

20. What can we infer from the passage?

　A. i Books are sure to replace the paper textbooks.

　B. We should pay little attention to the backpack weight.

　C. Some things don't get better with age, such as paper textbook.

　D. The students can use ipad freely.

二、 书面表达

目前一所知名高中决定在初中毕业生中降分招收音乐、体育特长生，这一做法在社会上引起了很大反响。请你根据以下所给观点，就其利弊给一家英文报纸写一篇英语短文，并提出自己的观点。