The man ________ a promising politician must have been his uncle.

The man ________ a promising politician must have been his uncle.

A.referred to

B.referring to as

C.referred to as

D.who was referred to

答案及解析： C

referred to过去分词词组作后置定语，后接as段语使句意完整，主语是“被作为有前途的政治家提到的那个人”．