___________ is the richest man in this town?

___________ is the richest man in this town?
A、Who do you think
B、Whom do you think
C、do who you think
D、do you think whom
【正确答案】：A
【题目解析】：do you think作插入语，用在疑问词的后面；句子中缺少主语，所以不能用whom，故选A。