I ( ) writing a letter to Mary 填空

I ( ) writing a letter to Mary 填空 I am writing a letter to Mary now(同义句转换) 首字母填空Sally is writing a letter to her parents I'm writing a letter I am writing a letter. 1.i'm writing a letter to my penpal. writing,my,i,a,father,letter,to,am 排句 Mary is writing （ a letter to her pen pal） 对括号内提问. Mary is writing a letter to her pen pal.(这个句子是就A LETTER 提问还是 I‘m writing a letter.改成问句 I'm writing a letter now I not writing a letter.改错