What ______ next will be discussed at today's meeting.

What ______ next will be discussed at today's meeting.
A、will do
B、to do
C、shall we do
D、to be done
【正确答案】：B
【题目解析】：这是不定式的一种表达，疑问词+to do(to be done被动)可以在句中作主语、宾语等。这里作主语。