Question

They suggested that the professor ________ just now should be made chairman of the meeting．

[　　]

A．

referring to

B．

referring

C．

referred to

D．

referred

Answer 1

答案：C
解析：

句意是“他们建议刚才提到的那位教授应当成为会议的主席”。referred to是过去分词短语作后置定语，修饰professor，表示被动关系，意为“被提到的”。