be used to eating using 为什么后面要用use加ingeat加ing我知道，为什么后面要用use加ing

I___bacon and eggs every morning A am used to eating B used to eating Cam used to eat D to be eat 翻译it used to be easy for us to decide when to put up the decorations be used for be used to be used from区别 used to be used to be翻译 I used to be used to be to be used used to be to be used to be used be used to be used to used to be be used to the money___by us will___those people in need.A.raising;be used to help B.raised;be used to helpC.raising;be used to doing D.raised;be used for help答案是B,那A为什么不行? used to／be used to／be used for的区别 be used for doing,be used to do,be used as,be used in,be used to doing,used to