听下面一段独白，回答一下小题。【小题1】

A．About 150.

B．About 12.

C．About 15.

D．About 5.

【小题2】

A．They have limited access to friends’ updates.

B．They get pressure from their friends in real life.

C．They make virtual friends with their employers.

D．What they post online may offend their friends.

【小题3】

A．Online friendship is of significance for teenagers.

B．Teenagers interact with their friends mostly on line.

C．Teenagers’ online friendship is superior to that in real life.

D．A majority of teenagers prefer to make new friends online.