To Whom It May Concern：
It is my great pleasure to recommend Mr./Miss XXX to you, as she was one of my finest students in our department.
Mr./Miss XXX began attending my English classes in XXXUniversity in XXXX and graduated in spring of XXXX. Though it has been over eight years since I last saw her, the deep impression she made on me has not faded in the least. She is very intelligent, honest, creative, articulate, adaptive person. Her high academic achievement speaks for itself: she consistently scored in the top X% in class.
I am certain that Mr./Miss XXX would make great contributions to your company, and I strongly recommend her for the position. Please do not hesitate to inquire further if I can be of help to you.
Sincerely,
XXX