First of all, you need to introduce yourself politely, and accurately tell the teacher your real results in the first entrance examination for postgraduate entrance examination and the results in all subjects.
Secondly, you can ask about the adjustment in previous years, but you must pay attention to the discretion. Don't ask too many questions. It is best to adjust the details of what questions to ask during the second interview.
Finally, you can learn about the professional situation of the school.