It is so great to hear from you again. It is a great pleasure for me to

　　With great delight I learned that

　　I must apologize for not writing to you sooner.

　　建议：In my experience, it seems that _______ would make sense in your situation

　　In my opinion, it would be wise for you to take the following actions:

　　感谢：I truly appreciate your kindness. Thank you from the bottom of my heart for

　　道歉：I apologize most sincerely for

　　I am so sorry to have put you through so much trouble

　　邀请：We would be honored to have you there with us

　　I will cover all the expense involved.

　　抱怨：I very much regret to have to inform you that

　　We will appreciate your willingness to make up for the loss

　　I hope that the above situation will be improved as soon as possible

　　咨询：I would like to request some information about

　　Should I need to send further materials, please let me know.

　　求职：In anwser to your advertisement a post as

　　in your office. I hope I may be granted an interview