The Ohio report shows that students who used Facebook had a “significantly” lower grade point average— the marking system used in US universities—than those who did not use the site.
“It is the equivalent of the difference between getting an A and a B，” said Karpinski, who will present her findings this week to the annual meeting of the American Educational Research Association.
Some UK students have already spotted the potential danger. Daisy Jones, 21, an undergraduate in her final year at Loughborough University, realized the time she was spending on Facebook was threatening her grades—prompting her to deactivate (注销) her account.
Jones is among the few to have recognized the risks. According to Karpinski's research, 79% of Facebook using students believed the time they spent on the site had no impact on their work.
Facebook said: “There is also academic research that shows the benefits of services like Facebook. It's in the hands of students, in consultation with their parents, to decide how to spend their time.”
21．According to the passage we know that most present students like to get in touch with their friends by ________.
A．sending short messages
B．chatting online
C．Facebook site
D．sending emails
答案：C 细节理解题。根据文章第二段内容可知，16岁至24岁的英国人中约有83%通过Facebook，Myspace和Bebo等社交网站与朋友保持联系并组织社交活动。
22．The study shows that compared to ones who avoid websites，the school results of the students who use social networking sites are ________.
A．the equivalent of the difference between getting an A and a B
B．not less grades in all studies
C．more ambitious to succeed in their studies
D．just the same
