1) The Internet is a large .................. connected together around the world. a) system of programms b) system of computers c) chat rooms 2) Peopel can use the Internet to .....information, buy and sell things, communicate with each other. a) delete b) destroy c) share and find 3) A virus is a program that ..........all your computer programs. a) destroys  b) downloads c) updates 4) When your computer gets a virus you need..... . a) a doctor b) a message c) an antivirus program 5) You can ...... one for free from special websites. a) download b) destroy c) use 6) Antivirus programs ......... all the information you download. a) share b) check c) appear 7) You can surf the Net.......... . a) careful. b) free. c) safely. 8) You have to ............. your antivirus program often. New viruses appear all the time. a) download b) update c) connect

Computer Bugs.

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？