【正确答案】
To Professor Zhang,
I have the pleasure of writing this letter of recommendation for Mr. Liu Shangshu, who is a student of mine. He wishes to be considered an applicant for the MS course of biology at your college.
Liu Shangshu is a gifted young man. He has devoted his heart to his study and research. Not only has he obtained A' s in all major subject areas, but he has also published several articles in the school journal, illustrating his originality and his deep understanding of science. For his competence, he is respected by everyone who knows him.
I feel sure that, if he is accepted by your college, he will be able to develop his talent to its fullest potential. I sincerely hope you will give him favorable consideration.
Yours cordially,
x x x