D. Works of popular writers often have a lot of readers.

　　11. What makes it much harder to be a celebrity today?

　　A. Availability of modern media.

　　B. Inadequate social recognition.

　　C. Lack of favorable chances.

　　D. Huge population of fans.

　　12. What is the author’s attitude toward modern celebrity?

　　A. Sincere.

　　B. Skeptical.

　　C. Disapproving.

　　D. Sympathetic.

　　D

　　Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.

　　If health issues arise from cell phone use, the possible effects are huge. Voice calls?Americans chat on cell phones 2.26 trillion(万亿)minutes annuallyearn $109 billion for the wireless carriers.

　　Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.

　　Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.

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