I reicived a letter from my friend yesterday.(同义转换)I ____ _____ my friend yesterday.我看过答案了,竟然是"heard from",

I reicived a letter from my friend yesterday.(同义转换)I ____ _____ my friend yesterday.我看过答案了,竟然是heard from, “I”（ ） a letter “I”（ ）a letter But I () a letter I ( ) a letter i wrote a letter.passive I'm writing a letter I am a letter是什么意思 I am a letter [改错] I wrote a letter with a pen. i was a scarlet letter是什么意思 I am writing a letter是什么意思 I‘m writing a letter.改成问句 I am not writing a letter.改错、 I am writing a letter.提问： I not writing a letter.改错 i want to write a letter ___mother I e___ a letter from my brother