41.  We can happily sending e-mails to your friends and coworkers , posting messages on school or company network bulletin boards , and the most important thing is that you can find out any information you want.

42.  Internet gives us lots of convenience, such as chatting with friends, posting messages on the network bulletin boards and so on.

43.  Just imagine that your school email box is bombarded with junk mails or a private photo of you is posted on the Internet.

44.  Before you post a message or picture on a community electronic bulletin board, think about who will see it, who can copy it, and where it might end up.

45.  It's important that we follow the rules on the internet and that we should be cautious when using any of its features---whether it is email sent and received or bulletin boards read and messages posted.

46.  Initially, you should mind photos you posted on the web, which might be copied or theft.

47.  Here we are in the electronic age, happily sending emails to our friends , posting messages on school bulletin boards, and chatting away in a computer service forum with buddies who share interests with you.

48.  We can post messages on school or company network bulletin boards and chat away in a computer service forum with buddies who share interest with us .

49.  Or they will post misleading words on forums which causes panic among the public.

50.  Grasping the opportunity, online stores post pictures of their products together with illustrations on the websites to facilitate online purchase.