【正确答案】
[参考样文]
Dear Professor Smith,
The bearer of the letter, Mr. Collins, was my son's roommate at college, and is a recent graduate of Harvard Law School. He is looking for a job in a law office where he can get sound basic training and experience, and he has asked me to give him a letter to you.
I have known young Collins for more than ten years, and I can truthfully say I have never met a more likable, intelligent and ambitious young man than he is. Whenever dealing with any new task, Mr. Collins always, tries hard to fulfill it as soon as possible. In addition, he is always ready to help others when they are in trouble.
I hope you will start him on the way to the brilliant career. Looking forward to hearing from you soon.
Cordially yours,
Li Ming