Social networking isn't only for the under 40s. More than 25 percent of Americans 50 years

Social networking isn't only for the under 40s. More than 25 percent of Americans 50 years and older stay connected using sites such as Facebook, MySpace and Twitter, according to new research.
The latest data tells us that more and more social networking is being a part of everyday life for Americans 50 plus, said Kevin Donnellan, the chief munications officer at AARP, which released the report.
Nearly a quarter of older Americans are on Facebook and 73 percent said they use it to stay in touch with relatives, but not just their children and grandchildren. They are using the Internet to keep up with the world and the people who are important to them, said Jean Koppen, the author of the report. She added that older adults are also on Facebook to stay connected, not only with their family, but with their friends and peers. Almost 50 percent of older adults were introduced to the social networking sites by a family member, mainly a child or grandchild. Just under one-fifth of adults aged 50 and older say they do not use the Internet, according to the report.
The findings are based on a telephone survey of 1,863 adults. In addition to keeping up on Facebook and Twitter older adults are also aware of the latest technology. Eighty-three percent had heard about the Apple iPad and 11 percent intended to buy one.
【小题1】What’s the main idea of the passage?             
A.       Social networking isn’t for the under 40s in the U.S.A.
B.       American old people’s way of life is quite fashionable.
C.       The Internet is also popular among the American over 50s.
D.       Facebook, MySpace and Twitter are hot websites in America.
【小题2】Which of the following statements is TRUE according to the passage?    A．Nearly 2000 adults took part in the survey on line.B．The over 50s were introduced to the Internet by the young.C．About 20% of adults aged 50 and older don’t like the Internet.D．Many Americans 50 plus stay connected using the Internet.【小题3】What’s the underlined sentence used for?    
E.                   It’s used as a reason for the popularity of the Apple iPad in America.
F.                   It’s used as an example of the older adults’ awareness of the latest technology.
G.                  It’s used as a suggestion to the readers who are interested in the IT products.
H.                  It’s used as a choice for the Americans intending to use Social networking.
【小题4】Where can we most probably read this passage?    
I.                     In an experiment introduction.
J.                    In a puter magazine.
K.                  In a product advertisement.
In a news reportC