【答案解析】Dear Mr. Smith, I am very happy to be the sales representative of the Medical Company owing to your help. I know that the recommendation about me which you sent to the manager weighs a lot for my getting the job. I' m deeply grateful to you, not only for this particular reference but for the help and encouragement you have always given me. I shall certainly make every effort to do the job here and justify your faith in me. Sincerely yours, Tom