this is the question ______ that we've had so much discussion
问题描述：
this is the question ______ that we've had so much discussion
4.This is the question __.
A.that we've had so much discussion
B.we've discussed about
C.we've had so much discussion about
D.of which we've discussed
答
discuss是个及物动词,后面不需要介词可是答案是we've had so much discussion about 有点困惑discussion是discuss的名词形式，用了discussion，就要用介词了哦！我懂了 谢谢^ ^