American universities are rushing towards a wireless future. They are installing networ that let students and teachers surf the Internet from laptop computers anywhere. professors say the technology26___a growing challenge: Retaining their students' attention. In a classroom at American University in Washington Deen27_ and drawbacks of the new wireless world were on display. From the back row of a lecture hall, more than a lozen laptop screens were visible. As Professor Jay Mallek lectured on the finer points of an office budget, many students went online to surf the Internet, while a young man showed amusing email to the woman next to him, and then _28_____ over to read the online __29___ of The Wall Street Journal. Distraction(注意力分散)is nothing new. As long as there have been schools, students have whispered, passed notes and even gazed out of the window a daydreamed. But the arrival of the laptop has introduced new __30____for distraction, and outwerh wireless introduces an even31_range of distraction.This is_32annoying for law professorsmany of whom still live in the world of paper“This is something that hurts the students themselves,”said Ian Ayresprofessor at Yale Law School, who__33___the Internet’s entry into the classroom.However,Professor Mallek sees it differently. He said the benefits of the technology__34__the problems. He suggested that it might even be making him a better teacher.He takes the __35___of losing his students to e-mail and online newspapers as a challenge to keep lectures interesting and lively.A) opportunities F) especially K)switchedB)threat G)broader L) automaticallyC) convey H)benefits M)posesD)opposes I) edition N)outweighE)unattractive J)demonstrates O)disorders