8．Every year，millions of Americans see their personal information leak into the wrong hands．Maybe there's spyware on the their computer，or a service they use suffered a security reach，leaving customers at the risk of exposure．Or perhaps their password is easy to guess．
Don't fear：You can easily set up proper defenses．Here's how．
●Clean Your Computer and Smartphone
Before you put new security measures into place，make sure your devices are as spotless as possible．This means installing a good antivirus program and taking the time to clear out any spy-or malware that may have already infected your system．These days，it's also worth it to make sure your phone is safe from viruses．Iphones are less likely to be targeted by spyware，but Android users should download the Lookout app to scan their devices and ensure everything is as it should be．
●Secure Your WiFi．
It's fairly easy for potential criminals to gain access to your information if they're able to share your connection-that's why you want to be careful when using public WiFi．Even though you put security measures into place a couple of years ago，it's a good idea to refresh your settings．
●Use passwords
What you've heard is true：Passwords should use a variety of special characters，numerals，letters，and cases when possible．
●Check the shopping security
Take care when shopping online．Always check the security symbols when using an online site for shopping．If the lock icon encryption （加密）  is not there，do not give out credit details．Also，check that the site is legal-never go to a site from a random email and start shopping online．
Keep a separate credit card just for online shopping．This will make it easier to cancel if something bad does happen and your other credit card for"in real life"can still be used uninfluenced．
Don't store information on any store's website．It may be convenient but it's also a possible loss to you if the site is hacked．

21．To put new security measures into place，we need toC．
A．clear out everything in the system
B．make a random selection of network
C．get rid of potential spyware
D．refresh the infected system
22．According to the passage，the risk of exposing personal information may possibly be caused byB．
A．the applications of antivirus programs
B．the practice of using public WiFi
C．the difficult access to passwords
D．the separate credit card for online shopping
23．Which of the following is an improper way to shop online？D
A．Adopting a unique password for every website．
B．Shopping online at reliable websites．
C．Keeping credit details safe by checking security symbols．
D．Monitoring credit card by storing information online．

分析 本文主要講述了我們應該如何設置適當?shù)姆烙�，來防止信息泄露．作者給出了四點建議：1、清潔您的電腦和智能手機；2、使用安全的WiFi；3、使用密碼；4、檢查購物安全．

解答 21．C 細節(jié)推斷題．根據(jù)第一段Maybe there's spyware on the their computer，or a service they use suffered a security reach，leaving customers at the risk of exposure．可知為了設置新的安全措施，我們需要擺脫潛在的間諜軟件．故選C．
22．B 細節(jié)推斷題．根據(jù)第四段It's fairly easy for potential criminals to gain access to your information if they're able to share your connection---that's why you want to be careful when using public Wi-Fi．可以知道公共wi-fi容易讓潛在的犯罪分子獲得個人信息．故選B．
23．D 細節(jié)理解題．根據(jù)最后一段Don't store information on any store's website．It may be convenient but it's also a possible loss to you if the site is hacked．可知不要在任何商店的網(wǎng)站上存儲信息，它可能是方便的，但它也可能是一個損失．故選D．

點評 本文考察學生的理解推斷能力以及細心程度，只要抓住文章的關鍵詞，采用尋讀的方法查找細節(jié)，就能找到正確答案．

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