【正确答案】
Dear Miss Zhang and friends,
It has been one month since I came to Boston. How is everything going on with you?
Boston is really a beautiful city. There are many famous universities and institutes here. Among them are Harvard University and Massachusetts Institute of Technology.
Now I'm studying in a senior high school. My English has become much better since I came. I can understand what the teachers talk about in the class, except physics and math classes which I can catch only 60%. But I'll make my efforts to catch up soon.
I have also made many American friends here. They help me a lot with my studies and often invite me to parties. I'm very happy with them.
Best wishes.
Li Lan