【答案解析】[范文]
Dear HR,
   I take great pleasure to introduce one of my best friends Susan to you. I recommend her to do an internship in your company.
   The primary reasons of my recommendation are as follows: First, in the last four years, she studied hard and got excellent grades in exams. Second, as the main membership of the Student Union, she develops strongly comprehensive ability to deal with various situations calmly. In addition, she has a very pleasant and favorable personality that helps her build good relationships with others.
   I strongly recommend this promising young lady without any reservation. Will you please consider my recommendation and offer her a position in your company? Your favorable consideration and assistance to her would be appreciated.