However, rudeness is never acceptable. Don't assume it is OK to be rude if the person you're in touch with won't recognize you. If you have something awful to say, have the courage to face the person and say it, write a letter or e­mail and sign it, or forget it. Upsetting people with unsigned messages is cruel and disgusting.

　　We shouldn't blame technology for our shortcomings. Technology is here to help us, but we should not allow it to take over our lives. An important step is acknowledging our shortcomings. People spend a lot of time pointing out bad manners but it would be even more helpful if we'd publicly acknowledge good manners when we see them.

　　语篇解读：本文是一篇议论文。现代人比从前更加粗鲁。不过这不是科技的错，而是人们自己的错。人们不仅要看到别人的无礼行为，更应该欣赏别人的礼貌行为，这样才更有助于改善人们粗鲁的行为。

　　12．What can be inferred from the underlined sentence in Paragraph 1?

　　A．People can tell good from bad behavior.

　　B．Radar is able to observe human behavior.

　　C．People care little about their behavior.

　　D．Radar can be used to predict human behavior.

　　解析：选C　句意猜测题。阅读第一段可知，本段主要说明了“People are ruder today”(现在的人们更加粗鲁)这一观点。由此可以推知“Manners have fallen off the radar.”也是在强调人们变得粗鲁这一事实。故选C项。

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