一道英语习题I__the trueth of your remarks,although they go against

一道英语习题
I__the trueth of your remarks,although they go against my intersts.
A cannot but admit B cannot help but to admit C cannot but admiting Dcannot help but admting
为什么不选B呢?B也是不得不去做某事吧
答案不是D

A是正确答案
1.can not but do sth,意思是：不得不做某事.
例如：
I cannot but admire her courage.
我不得不佩服她的勇气
2.can not help but do sth,意思也是：不得不做某事,禁不住
例如：
I can't help but blink in such bright light.
在这样的强光之下,我禁不住眨了眨眼.
3.can not help doing sth 意思是：情不自禁做某事
例如：
I can not help laughing.
我情不自禁的笑了.