The gray building is where the workers live, and the white one is where the spare parts______. A.are producing B.are produced C.produced D.being produced
A. A.are B.are C.produced D.being
【参考答案】
B where引出一个主语为spareparts的表语从句,谓语动词produce同主语的关系应该是被动关系,故选B。