Last year, I went to a summer camp in the United States with my classmates. It was my first time to go abroad. 

I lived with a host family in Los Angeles for five days. My host family was friendly and gave me lots of advice. For example, they said I should say "excuse me" if I have to interrupt(打断) someone or ask for directions.

I also took some classes. They were different from the classes I've had back home. In the US, each class is like a seminar. Students join in groups, speaking freely and creating a cheerful atmosphere(氛围). I had to work hard to learn more vocabularies, so I could better communicate with my international classmates. I used to pay little attention to my word usage(使用), but now I pay more attention.

During my visit, I also went to some famous universities in Boston, New York and Washington, D. C. We learned about the history behind the universities. At MIT(麻省理工学院), we saw lots of names on a wall in the hall. The tour guide told us they were the names of students who had lost their lives during wars. I was inspired(鼓舞) by the fact that they fought for their country.