请英语很好的人过来帮我翻译一句话！急！在线等！

A piece of test paper and an essay for Chinese, words writing and letters for English and there is a large paper of maths puzzles. However I went to my sister's house on Friday and we had fun. I left my sister for English class until 3 o'clock today. Ms Yu, our english teacher taught us many grammar items, which are too complicated. Now i still have an essay left and will get it done on Dunday tomorrow.

Best regards
yours Helen

There is a language test and an essay in English to take down the words and letters, there is a large sheet of mathematical thinking of the title!
But Friday, the day I went to my sister at home, we play very much, until 3 o'clock today, I went on with his sister to separate English classes, English teachers in danger to us on a lot of grammar problems, too esoteric!
I now have an essay on Sunday in time for tomorrow, such as cough!
I wish good
Your good friend, Helen

Dear XXX,
Thank you for you letter.I would very much like to be your penfriend
I am also twelve years old.I live in Nanjing . I am a student at Jinlin Primary School.My hobbies are listening to music and making model plans.

My telephone number is 4427086311245 and my fax is 4420786311246.
Please write to me soon . I would like to know more about you .
Best wishes
Peter

这篇文章我写过，祝你成功！！！

Language is a paper and a composition, English words and letters to copy a piece of mathematics and graded!
But I went to my sister on Friday, we enjoyed ourselves, until today at 3 o 'clock I with my sister to English classes, separate threat to our English teacher explains many grammar question, too abstruse!
I now have a composition, etc. On Sunday! Catch tomorrow.
Alles gute
Your good friend, Helen