Are you on a tourist visa or a student visa?
你是使用旅游签证还是学生签证的？

Student visa.
学生签证。

What's the reason for the extension?
你延长签证的原因是什么？

I'm going to practical training as soon as I receive my master's degree from the University of Pennsylvania early next month.
我下月初拿到宾夕法尼亚大学的硕士学位后就要进行实习训练。

We'll need a letter from your University and a financial statement from you.
我们需要你学校的证明信和你的财务报表。