i can hardly recognize Larry,he isn't ____

问题描述:

i can hardly recognize Larry,he isn't ____
a,what he used to do
b,that he used to do
c,what he is used to
d,what he is used to being答案是第一个,我怎么感觉四个答案都不对呢,应该是what he used to be 呢

没错,正确答案是what he used to be,即“他过去的那个样子”.
如果是what he used to do,则翻译为“他过去(常常)做过的事”,和主语he(指人)无法对应.