13.The book was written____ Lu Xun.

A. by  B. with  C. as  D. /

14. I want to watch the news on TV. _____, please.

A. Turn on it  B. Turn it on  C. Turn off it  D. Turn it off

15. If you want to open a file, please____ on the icon.

A. left twice clicks B. left double clicks C. double left click D. twice left clicks

16. －Can you work out this math problem?－Yes, I can. It’s_____.

A. hard  B. difficult  C. simple  D. easier

17. Information can be stored on the _____.

A. programs B. floppy disks C. hard disks D. Both B and C

18.The package tour ____ everything. You don’t worry about it.

A. covers B. including C. have D. owns

19. Can you show me_____ to start the computer?

A. what B. where C. how D. which

20. Do you want her_____ one for you?liuxuepaper.com