[单选题]___________ 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。
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