1、How is it going? 最近怎么样?
2、I am glad to receive your letter.很高兴收到你的来信。
3、You asked me about(+problem question 等），now let me give you some advice.你在来信中询问我，现在，让我给你一些建议。
4、It has been a long time since we met.我们很久没见面了。
结尾：
I am looking forward to receiving your letter.我期待着你的来信。
2、Thank you in advance.提前谢谢你。
3、Please write to me as soon as possible.请尽快回信。
4、Good luck |Best wishes.祝你好运。