Some of the middle-aged people _________ to the meeting were fam

Some of the middle-aged people _________ to the meeting were famous professors.
A、who invited
B、were invited
C、inviting
D、invited
【正确答案】：D
【题目解析】：the middle-aged people who are invited to the meeting省略who are后，即为the middle-aged people invited to the meeting.