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Someday a stranger will read your e-mail without your permission or scan the websites you've visited. Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it's likely some of these things have already happened to you. Who would watch you without your permission? It might be a spouse, a girlfriend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen— the 21st century equivalent of being caught naked.
Psychologists tell us boundaries arc healthy, that it's important to reveal yourself to friends, family and lovers in stages, at appropriate times. But few boundaries remain. The digital bread crumbs you leave everywhere make it easy for strangers to reconstruct who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret. The key question is: Does that matter? For many Americans， the answer apparently is“no”.
When opinion polls ask Americans about privacy, most say they are concerned about losing it. A survey found an overwhelming pessimism about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me”. But people say one thing and do another. Only a tiny fraction of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths to avoid using the EZ-Pass system that can track automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessandro Acquisti has run a series of tests that reveal people will surrender personal information like Social Security numbers just to get their hands on a pitiful 50-cents-off coupon. But privacy does matter—at least sometimes. It's like health: when you have it， you don't notice it. Only when it's gone do you wish you'd done more to protect it.
What does the author mean by saying “the 21st century equivalent of being caught naked”（Para.2)?
作者在文章第一段提到了“也许某一天会有人在未经允许的情况下，查看我们的邮件，浏览我们上过的 网站，借此来了解我们的喜好和习惯”，所以猜测作者提到“the 21st century equivalent of being caught naked”意在表达“人们的个人信息很容易在其毫不知情的情况下被泄露”。故选A。
What would psychologists advise on the relationships between friends?
根据文章第三段提到的“心理学家表明保持适当的距离是健康的，在合适的时间，向家人，朋友和爱人展示出自己是非常重要的”。由此可知心理学家提倡人与人之间保持适当的距离，即使是朋友之间。故选 C。
Why does the author say“we live in a world where you simply cannot keep a secret”（Para.3)?
定位到文章第三段，作者在此提到“不管你是否相信，在谷歌上的一个简单的搜索就显示出你的所想”。 由此可知作者认为“我们生活在一个没有秘密的世界”的原因是我们在使用现代科技的时候会留下相关痕迹。
What do most Americans do with regard to privacy protection?
根据文章最后一段提到的“But people say one thing and do another”人们往往这样说，但却不这样做。由此可知“人们说的很多，但却做的很少”。故选D。
According to the passage, privacy is like health in that________.
定位到文章最后一段最后一句 “It's like health: when you have it, you don't notice it. Only when it's gone do you wish you’d done more to protect it”，就像健康，当你拥有的时候就不在乎，当失去的时候，才会想到 应该多做一些事来保护它。作者意在表达“人们对待隐私和对待健康一样，总是失去后才知道它的珍贵”。 故选 D 。