The question ( ) tomorrow is whether this highway should be bu

The question ( ) tomorrow is whether this highway should be built.
A、debated
B、to debate
C、debating
D、to be debated
【正确答案】：D
【题目解析】：to be done 动词不定式的被动形式做后置定语，句子含义是明天讨论的问题是高速公路是否修建。