What dou think ___about at the meeting tomorrow?
问题描述:
What dou think ___
答
talking
动词ING做状语
答
What do you think will be talked
你认为明天的会上将讨论什么?
答
will be talked
在这里 do you think 是作为插入语,所以就是what will be talked about at the meeting tomorrow.
内容是被谈论的,所以用被动语态,时间为明天,所以为will be talked.