Big schoolbags have been a serious problem for students for a long time. Maybe your schoolbag is too         to carry, and it troubles you a lot        you want to find a book out to read. Now an e-­textbook will         you.
It is said that e-textbooks are going to be        in Chinese middle schools. An e­-textbook, in fact, is a small          for students. It is much        than a usual schoolbag and easy to carry. Though it is as small as a book, it can       all the materials (材料) for study. The students can read the text page by page on the        , take notes with the pointer (屏写笔). Or even “        ” their homework to their teachers by sending e­mails. All they have to do is to press a button.
Some people say e-­textbooks are good, but some say they may be        for the students' eyes. What do you think of it?
小题1:A. light             B. heavy        C. useful        
小题2:A. till              B. after            C. when
小题3:A. trouble           B. prevent       C. help    
小题4:A. used              B. kept             C. invented 
小题5:A. computer          B. radio            C. pen      
小题6:A. heavier           B. lighter          C. cheaper      
小题7:A. hold              B. build            C. discover     
小题8:A. blackboard            B. desk           C. screen       
小题9:A. find out          B. hand in          C. get back     
小题10:A. helpful              B. famous       C. bad

---May I _________ your CD?
---Yes. How long will you _________ it?

A．borrow, keep

B．borrow, borrow

C．lend, keep

D．lend, lend