Life has 　1　for millions of teenagers across the world who now make friends online. 　2　you use chat rooms, QQ,MSN or ICQ, you are 　3　of a virtual community（虚拟社区）. “I rarely talk with my parents or grandparents, 　4　I talk a lot with my old friends on QQ,” said Fox’s Shadow, the online nickname（网名）used by a Senior 2 girl in China .“Eighty per cent of my classmates use QQ 　5　school.” QQ is the biggest messaging 　6　in China. A record 4 million people used it one Saturday night in October, 　7　to Tencent ,the company which developed QQ. And Fox’s Shadow might well have been one of them. “I log in（登陆）on Friday nights, and Saturdays or Sundays when I feel 　8　.I usually 　9　 about 10 hours chatting online every week,” she said .“But I rarely talk with 　10　,especially boys or men.” Even though she likes chatting, she is careful about making 　11　with strangers online. “You don’t know 　12　 you’re talking to. You should 　13　be careful about who you trust online.” Many people would like to meet offline when they feel they have got to 　14　someone very well. Fox’s Shadow once met one of her online friends face to face. It was a girl who was a comic fan like 　15　and they went to a comic show together. However, not all teenagers have been so 　16　.At the beginning of this year, a 17year old girl was killed after meeting a friend she had found on QQ. The criminals weren’t 　17　until last month. A 16-year-old Beijing boy, known online as Bart Simon, dislikes QQ users. “I used to chat on QQ, but I found that most people were talking 　18　,”he said. Now he chats online in English, using MSN. But he spends little time chatting as he sees it as a 19　of time and money .“If you are really 　20　to it, sometimes you just can’t concentrate in class,” he said. (1) .