we wrote a letter of thanks to--had helped us 解释一下为什么填whoever?谢

we wrote a letter of thanks to--had helped us 解释一下为什么填whoever?谢 分句子的主语和谓语we wrote a letter of thanks to whoever had helped us. He wrote a letter of ________ (invite) to his friends. i wrote a letter.passive they wrote a letter of thanks,which we all felt -A be B is C to be D deing 选什么为什么答案是c they wrote a letter of thanks,which we all felt --the highest praiseA be B is C to be D deing 选什么为什么答案是c we wrote a letter to ____ had helped us.A whoever B whomever I wrote a letter with a pen. WuDan wrote a letter of three ____last night. 中间填个单词 解释一下此句子结构What he wrote is more of a poem than a letter.这里of什么意思? he wrote a letter to me last year.对wrote a letter to me 划线提问 The girl wrote a letter just now.对wrote a letter划线部分提问 I wrote him a letter to show my ___ of his thoughtfulness.I wrote him a letter to show my ___ of his thoughtfulness.A：achievement B：agreement C：attention D：appreciation为什么?整句怎么翻译? peter wrote a letter to a penfriend in china 翻译 that night he wrote a letter to a newspaper. 英语翻译,人工翻译For me,Christmas always began in the middle of the cold,windy month of Nather.My sister,Alison,and I sat down in front of the fire and wrote a letter to Fther Christmas telling him about all the presents we wanted.We seriousl I wrote a letter last Sunday.变一般疑问句 it,mailed,I,then,letter,a,wrote,I组成句子