听力原文：M: Excuse me! Will my registration date change? W: For newly admitted students and undergraduates who are juniors or sophomores, the date could change as returning students at the senior level are given priority. You should cheek with Students Services one week prior to your registration date to ensure that there has been no change. M: Should I pay attention to the time? W: Yes, it is best to register on your date at the designated time. You cannot register before that date. M: What if I am unable to register at that time? W: You can register after that time, but the chances are you will have less of a chance getting into the courses that you want at the times that you want. M: When do the fees have to be paid? W: Fees must be received within 24 hours of registering. M: If I haven't received the financial aid I am expecting, is it possible for me to register anyway? W: In special circumstances, a letter from the university financial officer or a sponsor's authorization letter may be considered. Under those conditions, arrangements must be made with the registrar prior to your on-line registration. When should the man check with Student Services to ensure the change of registration date?