【正确答案】Dear school authorities,
I've already written a letter applying for my enrollment in a PhD course in your prestigious university and asked for further information about it, but yet received no reply. For the course will start in less than two months, I'm worried and eager to know whether I have the chance to be accepted. If I still can enroll, please send me some detailed information about the course, including the subjects going to be taken, the syllabus and most importantly, the cost. I'm looking forward to your reply. Thanks a lot.
Sincerely yours,
XXX