写给外国同学的信
1.了解对方近来的情况
2.通知对方同学将在元旦举行聚会
3.请对方参加

dear...:
It's been a long time since we last see each other. How is everything going on with you? Living in a foreign country must be quite different from here. Have you got used to everything?
I can still remember the happy days when we were at school. We used to be best friends. Our moniter told me a few days ago that we are going to have a classmates'meeting on the New Years Day. Nearly all the friends are going to come.Missing you terribly, we really hope you can come back to spend some time with us. It will be great if you can attend.We may talk about the old days and at the mere thought of it i get particularly excited. It has just been one year since our graduation but i feel as if we have been apart for a century. Sometimes i do feel i have grown old in this year, as old as a man who need a walking-stick to help his daily life. Anxious to see you all.

Best wishes for my best friend