Ask for advice Some Advice Please.

求教：下面的话用英语怎么说？

我尽我最大努力教你学习汉语！ I will do my best to teach you learn Chinese!

你是学习什么专业的？ What's your major? (In school enviroment.  In the work place, "specialty".  If you know the person's area but not its specifics (especially in college etc), "discipline".  For example, surgery... Heart surgery? Brain surgery? etc)

你是大学几年级？ What year are you in?

我等着你（如果他说我一会见来，我应该怎么用英语说“你忙吧！我等着你”）

I shall wait for you (if he said later, how should I reply in English? "Go on with your work/business.  I shall wait)

The above is the exact translation.  However, there are many ways of saying depending on the formality you wish to express.  As an example of informal speech:

"Okay, I shall wait."

"Later."

"Alright, later then alligator."

(this is slang, alligator has no meaning except to rhyme with "later" to lighten the situation. 虛詞)