I think it was a great honor for me to speak to the public.
A. to invite
B. to be invited
C. inviting
D. having invited
网友回答
A. to invite
(答案→)B. to be invited
C. inviting
D. having invited
解析：考查不定式的用法：固定句型是it’s a great honour for sb to do sth对某人来说做…是很荣幸的，it是形式主语，不定式是真正的主语，我是被邀请的 所以排除A C 句意：很荣幸我能被邀请来这里给公众做演讲。选B。