英语作文向班主任申请加入学生会申请书100字？

英语作文：
(Actually, you don’t need using many words to apply for a membership of the Student Union. Do as follows ;)
Dear The Head Teacher of Class,
I am writing to you to apply for the membership of Student Union.
I hope I can play more role in the organization. I can also learn more in the Union.
Please let me know if you have any question.
Sincerely,
xxx.

Hello, teacher, I very much hope to join the student union. Joining the student union can serve my classmates, exercise my ability and enrich my life. Joining the student union has always been my dream, and I hope to realize my dream one day.