写一篇你未能完成学习任务的英语作文

Dear Tom:
Long time no see ! Is everything going well with you ? I miss you so much. I know you are busying with your learning. but i hava many troubles. recently because of heary learning task, i have a lot of homework to do . i keep learning very late and lack of sleep. stay up results i can't concentrate on learning.i feel tired and just want to sleep.last week,i took an exam.without any doubt,i failed the exam . but the other students are energetic
it seems that they don't know tired, they are learning very hard. i am worried that that i will soon fall behind. you are my brst friend.i need your help.
I hope you reply as soon as possible. best wishes.
yours, lucy