my mocks went terrible i had 70s in my physics and chemistry but chemistry teacher gave me an A wanted to give me an A* because i did have a good grade in my mid terms but my finals went pretty badly. My physics teacher ended up giving me an A* after some conviencing. I would say go and talk to them privately tell them you will work harder, predicted grades can be quite important if specially if you havent done any of the actual board exams