关于上课答错问题的英文检讨

I am very sorry because I have given a wrong answer durning the class , I am a bit nervous at that time, but the question is that easy and the teacher has repeated for more than 3times, but I also got it wrong ,I promise I will never make the same mistake again, forgive me!

sir;
i am sorry for my mistake made in the class.but it is because....
so i do regret for it.in the future i will work hard with your help.
thank you
best wishes
yours faithfully
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