请翻译成英文：不必为我担心，我一切都很好！

I'm fine,thanks！ I'm glad to hear from you！Don't worry about me。everything is going well here ！How about your studying？What grade are you now？

I feel very happy that i had received your letter. I'm fine ,thank you. So,you'd not worry about me.Everthing is just on its right place.How is your class? And what grade are you now?

I'm fine,thanks!I'm happy for you letter.Don't worry about me ,I'm OK!What about your study?What grade are you now?

I am good, thank you! I am happy to receive your letter! Don't worry about me,everything is fine! How's your study?

I am good, thank you! I am happy to receive your letter! Don't worry about me,everything is fine! How's your study?