I don't want to have the question of what to furnish our room with ____about any more.为什么是过去分词.

I don't want to have the question of what to furnish our room with ____about any more.为什么是过去分词.
I don't want to have the question of what to furnish our room with ____about any more.为什么是过去分词.

I don't want to have the question of what to furnish our room with ____about any more.为什么是过去分词.
空格里是什么?