同学们，你假期通常做什么呢？今年暑假你有没有做一些特殊的事情呢？假如你是Nelly，请给Mary写一封信介绍一下你的暑假

Dear Mary,

How is it going? I just finished my summer vacation. What did you do on your vacation?

I usually stay at home, do my homework and watch TV in my summer holiday, so this time I decided to do something special. I went to Beijing by myself! You must be very surprised, aren’t you? I stayed there for seven days. I visited Tsinghua University and wathed an opera in the theater, it was great. I also visited some places of great interest, such as the Great Wall, the Summer Place and so on. But the most interesting thing was that I worked as a volunteer at the traffic time. There were too many cars and people in Beijing, so I helped a traffic police officer with his work every afternoon. I was tired but very happy.

My parents were so worried about me that I had to came back home, but I still want to do something useful next holiday, would you like to join me? Write soon.

Yours,

Nelly