Update your antivirus software regularly. Over 500 viruses are discovered each month, so you’ll want to be protected. These updates should be at least the products virus signature files. You may also need to update the product‘s scanning engine as well.

　　Back up(备份) your files on a regular basis. If a virus destroys your files, at least you can replace them with your backup copy. You should store your backup copy in a separate location from your work files, one that is preferably not on your computer.

　　5．This passage mainly tells us ______. A. what a computer virus is B. how to use email safely C. how to use computers safely D. how to prevent computer viruses

　　答案及解析： 5．D。主旨大意题。这篇文章是总分结构，所以主题句在首段。

　　6. Which of the following statements about the computer viruses is TRUE? A. A computer virus is a kind of worm. B. Not all computer viruses are man－made. C. Computer viruses run according to our wishes. D. A computer virus is a program or piece of code.

　　答案及解析： 6. D。。A，BAll computer viruses are manmade.，C，D。

　　7. When we use email, we should ______. A. open all the files we receive B. open any file even if we don’t know what it is C. not open any files if the subject line is questionable D. forward or reply to junk emails.

　　8. Which of the following statements is NOT true? A. We‘d better not down load any files from strangers. B. We’d better download files from a legitimate and reputable source. C. We should update our antivirus software regularly. D. We should store our backup copy in the same location as our work files.

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