题目内容：
Questions are based on the following passage.American universities are rushing towards a wireless future. They are installingnetworks that let students and teachers surf the Internet from laptop computers (笔记本电脑). But professors say the technology poses a growing（36）Retaining their students'attention.
In a classroom at American University in Washington D.C., the benefits and（37）ofthe new wireless work were on display. From the back row of a lecture hall, morethan a dozen laptop screens were（38）. As Professor Jay Mallek lectured on the finerpoints of an office budget, many students went online to surf the Internet. Studentswrite quick e-mails and send instant messages. A young man shows an amusinge-mail to the women next to him, and then switches over to read the online editionof The Wall Street Journal. Distraction is nothing（39）. As long as there have beenschools, students have whispered, passed notes and even gazed out the windowand daydreamed. But the（40）of the laptop has introduced new opportunities fordistraction, and wireless introduces an even（41）range of distraction.
This is（42）annoying for law professors, many of whom still live in the world ofpaper. "This is something that hurts the students themselves," said Ian Ayres, professor atYale Law School, who（43）the Intemet's entry into the classroom. However, ProfessorMallek sees it（44）. He said the benefits of the technology outweigh (胜过) the problems.
He suggested that it might even be making him a better teacher. He takes the（45）oflosing his students to e-mail and online newspapers as a challenge to keep lectures livelyand interesting.
A．visible
B．threat
C．possible
D．opposes
E. obstacle
F.especially
G.broader
H. drawbacks
I. new
J. demonstrates
K. larger
L . differently
M. challenge
N . arrival
O. Advantages
第(36)题应填__________
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