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1. Some performance evaluations require supervisors to take action. Employees who receive a veryfavorable evaluation may deserve some type of recognition or even a promotion. If su…… 2.What If Middle-Class Jobs Disappear? A. The most recent recession in the United States began in December 2007 and ended in June 2009, according to the National Bureau of Econ…… 3. Millions of Americans are entering their 60s and are more concerned than ever about retirement. They know they need to save, but how much? And what exactly are they saving for-…… 4.The Street-Level Solution A. When I was growing up, one of my father's favorite sayings (borrowed from the humorist Will Rogers) was: "It isn't what we don't know that causes…… 5. Fear can be an effective way to change behavior. One study compared the effects of high-fear and low-fear appeals on changes in attitudes and behaviors related to dental hyg…… 6. For investors who desire low risk and guaranteed income, US government bonds are a secure investment because these bonds have the financial backing and full faith and credit …… 7.Lessons From a Feminist Paradise　　A. On the surface, Sweden appears to be a feminist paradise. Look at any global survey of gender equalityand Sweden will be near the top. Family-f…… 8.Should Single-Sex Education Be Eliminated? A. Why is a neuroscientist here debating single-sex schooling? Honestly, I had no fixed ideas on the topicwhen I started researching…… 9. It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shedin Scotland. From the outside, she looked no different from thousands of…… 10.High School Sports Aren't Killing Academics　　A． In this month's Atlantic cover article, "The Case Against High-School Sports," Amanda Ripley arguesthat school-sponsored sports prog…… 11. His future subjects have not always treated the Prince of Wales with the respect one might expect.They laughed aloud in 1986 when the heir to the British（1）told a TV report…… 12. Children are natural-born scientists. They have（1）minds, and they aren't afraid to admit theydon't know something. Most of them,（2）, lose this as they get older. They becom…… 13.Meaning Is Healthier Than Happiness A．For at least the last decade, the happiness craze has been building. In the last three months alone, over1000 books on happiness were re…… 14.　Plastic Surgery A better credit card is the solution to ever larger hack attacks　　A. A thin magnetic strip (magstripe) is all that stands between your credit-card informat…… 15. Travel websites have been around since the l990s，when Expedia，Travelocity，and other holiday booking sites were launched，allowing travelers to compare flight and hotel prices …… 16. "That which does not kill us makes us stronger." But parents can't handle it when teenagers put this（1） into practice. Now technology has become the new field for the age-old b…… 17.Inequality Is Not Inevitable A) A dangerous trend has developed over this past third of a century. A country that experienced shared growth after World War Ⅱ began to tear apar…… 18.　Why the Mona Lisa Stands Out A. Have you ever fallen for a novel and been amazed not to find it on lists of great books? Or walked around a sculpture renowned as a classic, …… 19. Innovation, the elixir (灵丹妙药) of progress, has always cost people their jobs. In the Industrial Revolution hand weavers were ___1___ aside by the mechanical loom. Over the pas…… 20.　Countries Rush for Upper Hand in Antarctica A) On a glacier-filled island with fjords(峡湾)and elephant seals, Russia has built Antarctica’s first Orthodox church on a bill overlo……

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