“That’s not the most common scenario(一系列可能发生事件),” says David Finkelhor , a sociology professor at the University of New Hampshire. “Only 3 percent of teens aged 10 to 18 who use the Internet report being asked to meet offline. But the danger is real.”

　　Safety measures

　　Mary’s Myspace profile is set to “private”, which means that only the people she adds under the “friend” category can access her page. She also doesn’t have any pictures of herself on her site. The only self-identifying material she has posted is her name, grade, and a list of hobbies.

　　Stay safe and have fun online

　　Experts say almost 90 percent of U.S. teens online. But not everyone knows how to surf the web in a smart way. With these tips, you can have fun, stay safe, and avoid embarrassment!

　　●Pick a safe password. Make sure your password is something that other people won’t be able to guess.

　　●Pick a safe username. Make sure yours doesn’t say too much about you, “Happy girl 13” is better than “Alice Waters 13”. Don’t include your name, age, or where you are from. Never tell a stranger your name, school, address, age, birthday, phone number, or friends’ name.

　　59.The underlined word “invite” in the first paragraph has the same meaning as______________.

　　A．demand politely

　　B．require C．cause

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