I took a test to one of my few non-english speaking teachers and managed to get a D turned into an A. I was able to prove I had gotten the right answers even it it didn't look exactly right (time dilation problem, almost but not equal to C). Part of the problem is that they have a bunch of tests to grade so they take a swipe and move on. I found that if I had any questions on why I got the grade I did, it was worth talking to the prof. I didn't always give me the grade but I would find out why they did what they did and I could watch out for it later.

Good luck with the final.