my father said he ------a quiet boy when he was young.

问题描述:

my father said he ------a quiet boy when he was young.
A,used to be B,is used to being C.was used to being ,A和C我不懂句子是过去是吗?

used to do sth.过去常常做某事 这里的to是不定式
be used to sth./doing 习惯于某事 这里的to是介词
句意:我爸爸说他小的时候是个安静的男孩.