One of the things that made me long back in prison was that I had little opportunity thinking and reflection.
A. be
B. being
C. to be
D. to being
网友回答
A. be
B. being
(答案→)C. to be
D. to being
解析：首先关注到句中的long，明显不是“长的”的意思。此处long作动词，表示“渴望”，搭配的结构是long for sth.或long to do，此处的to不是介词，而是不定式to，由此可知答案为C