英语改错题 （共10处错误）
Dear Mary,]
Thank you very much for invite me to your birthday party in Saturday evening.I'd love to come and I have to go to the countryside to see my grandparents.They were very old and unluckily not in good health recently.My mother has been already called them and promised visit them with me this Saturday.We would stay at my grandparents' the whole weekend.So I'm real sorry I can't make it.I hope you will understand.Here I wish you a lot fun on your birthday and many happy return of the day!
Yours ,
Jim