B
Social media （社交媒体） is very popular in the world. More and more people start chatting with strangers（陌生人） online. They don't know each other, but they have great fun talking about their favourite things. It's a good way to make friends. However （然而）, it's not always safe. You may meet some bad guys. How to keep yourself safe? Here are some tips for you.
First, don't let your e-friends get your private information （私人信息）, for example, your real name, your school, your address and your phone number.
Second, don't send your photos to them and don't go out to meet your e-friends by yourself. If you want to meet one, don't forget to ask your parents to go with you.
It's good to make more friends, but remember （记住） "safety first". Always keep this in mind.
