请问是“a letter from England"还是“a letter from somebody"?

请问是“a letter from England"还是“a letter from somebody"? A letter from Mars. a letter from a letter from Tom. A letter from Jenny The letter is from England. A letter from my father a letter from your mother a letter from home 歌词 a letter from Uncle Lee Jane has just___ a letter from a friend of hers in England. a letter to 和a letter from之间的区别?