题目内容：

帮我看看我写的这封英语信
看看有没有语句不同或者语法错误之处?或者格式有没有问题?
Dear Sir or Madam,
I,as a sophomore in the university,am writing here to recommend myself as a qualified candidate for the job of PR assistant which you have advertised on poster.
The reasons why I am suitable for the job are numerous,with the following two being the foremost.To begin with,a mass of time is available for me to concentrate on the job.Besides,I was the students’ union chairman,so I have abundant experiences in administration and its like.
Thank you for considering my application and I am looking forward to meeting you.
Your sincerely,
X X