1) I am much pleased to inform you that.......
2) I wish to apply for the teaching position you are offering.
3) Your kind letter of November 22th arrived this morning.
4) In reply to your letter dated July 4, I want to say...
5) Thank you for your letter dated Dec.22, 2000.
6) Many thanks for your letter of Sept.5，1997.
7) A thousand thanks for your kind letter of June 5,1997.
8) Your letter which arrived this morning gave me great comfort.
9) Thank you very much for your letter of August 2 and the gift you sent me on Christmas Eve.
10) First of all,I must thank you for your kind assistance and high attention to me .
11) With great delight I learn from your letter of this Sunday that...
12) I am too excited and delighted at your good news.
13) I am very obliged to you for your warm congratulations....
常用结束语
1) Looking forward to your early reply
2) Hoping to hear from you soon
3) I hope to hear from you very soon.
4) We look forward to your reply at your earliest convenience.
5) Your early reply will be highly appreciated.
6) I hope everything will be well with you.
7) Please let us know if you want more information.
8) I wish you very success in the coming year.
9) Please remember me to your family.
10) With best regards to your family.
11) All the best.