急求英语作文，在线等，急求，有加分

Dear Mr.John Smith,

This afternnon, Grandma Wang insisted that I go to the police office and ask for you to thank you for your help her with the housework on the weekends. Unfortunately, you happened to be out then. I was told that you were busy with your duty every day ande you had gone to the neighbourhood to have an investigate for the citizen's difficulties and troubles in spite of your holiday today. I was deeply moved by your selfless spirit. I can't help writing to you to commend your noble deeds. Please accept my hearted gratitude to you.

By the way, Grandma Wang joins me in love to you.
The highest regards!

XX

Dear Mr.John Smith,
Hello.I'm a student you has just helped.Thanks for your help when I was in trouble.I went to the police station to see you yesterday but you were not there at that moment.I know you are busy everyday,serving the people of the city,and you have made great contribution to the construction