题目内容：

Big schoolbags have been a big problem for students for a long time. Maybe your schoolbag is too 31 to carry, and it troubles you a lot 32you want to find out a book to read. Now e -textbooks will 33you.

 It is said that many Chinese middle schools are going to use e - textbooks. An e - textbook, in fact, is a small 34for students. It is much lighter than a usual schoolbag and 35to carry. Though it is as 36 as a book, it can hold (容纳) everything for study. The students can read the text page by page on the 37 , take notes 38the pointer (屏写笔) ,or even "hand in" their 39to their teachers by sending e - mails. All they have to do is to press a button ( 按开关).

Some people say e- textbooks are good, but some say they may be40for the students' eyes. What do you think of it.?

1.A. expensive   B. heavy   C. light

2.A. till   B. after  C. when

3.A. trouble   B. help   C. solve

4.A. TV  B. radio  C. computer

5.A. easy   B. difficult  C. hard

6.A. smaller   B. small  C. harmful

7.A. paper   B. keyboard   C. screen

8.A. with  B. in   C. by

9.A. computer  B. homework  C. e - textbooks

10.A. bad   B. dangerous  C. good