Answer:
Hi, the underlined words are the errors:
In the middle of a debate in my speech class last week, I suddenly became very self-conscience (self-conscious). I could fill (feel) my heart beating faster, and I didn't no (know) what to do. I looked around to see if my nerves were having a (an) affect on the audience. of coarse (of course), they could here (hear) my voice trembling. The topic that we were debating was whether to eliminate letter grades in college, and everyone else was doing really will (well). But for some reason, my face turned bright red, and I would of (have) left the room if I could. After the debate, my classmates gave me lots of complements, but I new (knew) that they where (were) just trying to be nice.
❤❤
hope this is right