节目内容：
You are asked to write a letter of recommendation for Miss Liu Ming who wants to study for the Master's Degree under the supervision of Professor Smith who was once your supervisor in your graduate study. Write a letter to Prof. Smith in about 100 words. Do not sign your own name at the end of your letter, using "Li Ming" instead.
分析：
推荐信是向收信人推荐某人做某事的信件，一般分为三个部分：
1．指出被推荐的人及推荐的原因；
2．介绍被推荐人的情况；
3．总结说明被推荐人值得被推荐(例如能胜任工作)。
推荐信应多写被推荐人的优点，肯定其成绩。但内容应真实可信，语言热情得体。切忌夸大其实。
学习任务：
写一篇小作文