阅读理解
阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
A
Caught Twittering of on Facebook at work? It’ll make you a better employee. An Australian study shows that surfing the internet for fun during office hours increases productivity.
The University of Melbourne study showed that people who use the internet for personal reasons at work are about 9 percent more productive than those who do not. the study author Brent Coker, from the department of management and marketing, said “workplace Internet leisure browsing(工作时的网络休闲)”， or WILB, helped to sharpen workers’ concentration. “People need to zone out for a bit to get back their concentration,” Coker said on the university’s website (www. unimelb.edu.au/). “Short breaks, such as quick surf of the Internet, enable the
