问题补充:
They suggested that the professor just now should be made chairman of the meeting.
A. referring to
B. referring
C. referred to
D. referred
答案:
A. referring to
B. referring
(答案→)C. referred to
D. referred
解析:考查非谓语动词作定语。the professor 与refer to 为动宾关系所以用过去分词作定语。句意:他们建议刚才提到的那位教授应该当会议主席。