28．What would be the best title for the passage?

　　A．Saying “thank you” helps defeat your enemies

　　B．Saying “thank you” to create a sweet atmosphere

　　C．Simple “thank you”，high expectations

　　D．Simple “thank you” has new benefits

　　答案：D　主旨大意题。本文主要是关于表达感激之情的新研究发现，它可以大大改善人际关系，故D项符合全文主旨。

　　C

　　When Gretchen Baxter gets home from work as a New York City book editor，she checks her cellphone at the door.“I think we are attached to these devices(装置)in a way that is not always positive，”says Baxter，who'd rather focus at home on her husband and 12­year­old daughter.“It's there but we get crazy sometimes and we don't know where it should stop.”Americans are connected at unprecedented(前所未有的)levels—93% now use cellphones or wireless devices；one­third of those are “smartphones” that allow users to surf the Internet and check e­mails，among other things. The benefits are obvious：checking messages on the road，staying in touch with friends and family，efficiently using time once spent waiting around.

　　The downside：Often，we're effectively disconnecting from those in the same room.

　　That's why，despite all the technology that makes communicating easier than ever,2010 was the Year We Stopped Talking to One Another. From texting at dinner to posting on Facebook at work or checking e­mails while on a date，the connectivity revolution is creating a lot of divided attention. Many analysts say it's time to step back and reassess.

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