While there are still many people who don't feel comfortable using a credit card to buy over the Internet, e-commerce is absolutely here to stay. If you take a few precautions buying over the Internet can actually be safer than using your credit card in a restaurant. Just as you should notice your surroundings and suspicious-looking people when withdrawing (提取) money from an ATM, you should know how to recognize the warning signs of Internet tricks and take steps to avoid being a victim when shopping online. Here are some good tips to remember when shopping online: Before submitting your personal information to a site, try to find out how the information may be used and whether it will be sold to or shared with other businesses. If you don't like what you read, shop somewhere else. Don't provide personal information such as address , telephone number, social security number , or e-mail address unless you know who you are providing the information for, why it' s being requested , and how it will be used . Use a credit card, not a debit card (借记卡) for shopping on the internet. Debit cards don't have the same protection as credit cards. Carefully review your credit card and bank statement each month for unknown charges and inform. your credit card company or bank immediately if you notice any charges you didn't know about. Clean your computer with free online software that detects spy-ware and install a firewall (防火墙) to ensure the sites you shop on don' t install spy-ware on your computer. 1. While shopping online, you should {A; B; C; D} A. be sure nobody is standing beside you B. only shop at the site that you have often visited C. find out how the personal information willbe used D. never provide personal information 2. According to the passage, if you find your credit card has unexplained charges, you should {A; B; C; D} A. tell your credit card company as soon as possible B. change your credit card code number immediately C. check all the websites you have visited D. use a debit card instead of a credit card 3. The underlined word 'precaution' in Paragraph One means something done to {A; B; C; D}. A. make suspicious—looking people go away B. protect you against loss or possible dangers C. remind you to obey the rules when sopping online D. avoid being cheated when eating in a restaurant 4. What is not advised by the writer when shopping online? {A; B; C} A. Using credit cards. B. Installing a firewall. C. Visiting famous websites. D. Being very careful. 5. What' s the writer' s purpose in writing this passage? {A; B; C; D} A. To suggest a new way of shopping. B. To tell us the advantages of shopping online. C. To tell us how to shop safely online. D. To tell us how to avoid being cheated.