There will be more than five proposals at the meeting.
A. having been discussed
B. discussing
C. to be discussed
D. discussed
网友回答
A. having been discussed
B. discussing
(答案→)C. to be discussed
D. discussed
解析：考查非谓语动词。句意：在会议上将有五条以上的建议被讨论。讨论的动作在将来，故用不定式的被动式表将来。在这里to be discussed 作后置定语，所以选C。