E—schoolbags（电子书包）

E—schoolbags（电子书包）
Is your schoolbag too heavy?The e－shoolbag will help you.It is said that e－school-bags are going to be brought into 42 in Chinese middle school soon.
Heavy schoolbags have been a serious 43 for a long time,But the e－schoolbag will 44 .An e－schoolbag is 45 lighter than a usual schoolbag .Perhaps,the e－school-bag should be 46 an e－textbook.It is a small computer for student.It is as 47 as a usual book,48 it can still have all the things for study,such as textbooks,exercise books and so on.They can be made u 49 chips（芯片）like stamps.The students can read the text page by page on the screen（屏幕）,take notes （记笔记）,or even send e－mails to their teachers.They only need to 50 the right chip into the e－schoolbag.Then they cn use it.
Some people say 51 e－textbooks can be easily broken ,while others say it is not good to studentsˊ eyes.But only time will tell.
42.A.use B.useful C.used
43.Aidea B.problem C.question
44.A.work it out B.work out it C.wkrk out
45.A.very B.much C.too
46.A.call B.calls C.called
47.A.small B.smaller C.smallest
48.A.amd B.but C.or
49.A.into B.from C.up
50.A.bring B.put C.take
51.A..if B.what C.that