爸爸妈妈吵架了,劝架的英语做文怎么写?

Dear mom and dad,i'm sorry i 've only got 50 in my math test.I think that was mainly because i didn't realize the importance of this test.I must study harder form then on and make you all feel proud of me.The second reason of the poor score is that I couldn't understand what the teacher said in class.I should do my math homework everyday and practise them,so that my math will be better.Dear mom and daddy,don't be angry okay?I'll be a better student and get straight A's in my test.Your son Li Kai