41.What is the main idea of the passage?
A.Parents should use social networks more to understand their children
B.Students are using social networks too much
C.Social networking brings negative effects to student's face communication
D.Virtual life is easier than real life
42.What do most teenagers think about chatting on the Internet?
A.Chatting on the Internet is easier than talking with real people
B.Chatting on the Internet is more difficult than talking with real people
C.Chatting on the Internet is funnier than talking with real people
D.Chatting on the Internet is more boring than talking with real people
43.The percentage of 40% refers to
A.The number of parents who let their children use social media
B.The number of parents who do not want their children to use
C.The number of parents who use social media
D.The number of parents who do not use social media
44.Which sentence is not true according to the passage ?
A.The majority of teenagers find it easier to communicate with virtual friend
B.The majority of teenagers lacks communication skill
C.The majority of parents know how to use social media with their children
D.The majority of parents do not know how to deal with their children overuse of social media