they haven't decided yet [ ]they are going to hold the meeting.[a] that [b] which [c]what [d]where

they haven't decided yet [ ]they are going to hold the meeting.[a] that [b] which [c]what [d]where
they haven't decided yet [ ]they are going to hold the meeting.[a] that [b] which [c]what [d]where

they haven't decided yet [ ]they are going to hold the meeting.[a] that [b] which [c]what [d]where
选D
看decide后面跟的从句.they are going to hold the meeting.这句中主语谓语宾语都已经有了,句子的主要成分都齐了,所以只要考虑补充修饰.
这里可以用排除法,that不能用,which也不通顺,what多余了,要加只能加when或者where,所以选D.也就是哪里或何时召开会议.

D

D 地点状语从句

D