Is it in this factory__"Audi" cars are produced?( )

问题描述:

Is it in this factory__"Audi" cars are produced?( )
A.in which B.where C.which D.that
这道题从句的主语是"Audi" cars ,谓语是are produced,这里是被动,那么主谓都有应该用关系副词咯,我选的是B,而答案是D,为什么呢?

这是It is ...that ...强调句型!把要强调的部分提到that前面!
原来的句子是Is "Audi" cars are produced in this factory?
这里把in this factory提到前面,表强调,问的就是奥迪车“是不是就在这间工厂”生产的.