Isitinthisfactory__"Audi"carsareproduced?()
A.inwhichB.whereC.whichD.that
这道题从句的主语是"Audi"cars,谓语是areproduced,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?