to与for的问题He often writes letters ——- me中间横线是填to还是for,还是两个都可以

to与for的问题He often writes letters ——- me中间横线是填to还是for,还是两个都可以 Lily often writes letters to me.(转换为同义句) Lily often writes letters to me 同义句 It's a good exprience ___ me.横线填for还是to?说明理由 pleas pass the book ————me 填什么 for 还是to 是for吗 He often writes a letter to me 的同义句.He often （）（）me. because it is difficult （）me 填to还是for He feed his dog ___ meat.填to还是for? 一个英语问题：是They are helpful for me还是They are helpful to me show sth for me 还是 to me essential to me还是for me sell是与to搭配,还是for