Availability：5～7 Days　￡22.50($25.00)—————

　　54.The above message is probably taken from________.

　　A．a magazine

　　B．a Web page

　　C．a newspaper

　　D．a leaflet

　　55．If you intend to write an essay about education in different countries，you can refer to________.

　　A．Recreation Programming & Berlin at War

　　B．Race to the Pole & The “Times” Good University Guide

　　C．Race to the Pole & Berlin at War

　　D．Recreation Programming & The “Times” Good University Guide

　　56．If you buy all the three books available，it will save you________.

　　A．￡4.46

　　B．￡12.59

　　C．￡14.49

　　D．￡8.64

　　D

　　One in five US teenagers have some degree of hearing loss，according to researchers who said the problem is growing.“Teenagers really underestimate how much noise they are exposed to” Dr Josef Shargorodsky said.__①__

　　The study，published in the Journal of the American Medical Association，compared national surveys between the early 1990s and the mid-2000s.In the first survey，about 15 percent of teenagers had some degree of hearing loss.__②__Most of the hearing loss was in one ear only.While it was usually slight，one in 20 adolescents had more pronounced (显著的) problems—up 50 percent since the first survey.

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