You should bear in mind that he is not so generous as he___

问题描述:

You should bear in mind that he is not so generous as he___
A.was used to be B.used to be
C.was used to D.use to
答案应该选B,为什么不能选A?请说明原因,

因为这里was和used to be 是一个意思,可以说as he was 或者as he used to be