Not only ________ increase, but also _________ raised as well. [ ]

A. did the prices ; were their wages        

B. the prices did ; their wages were

C. did the prices ; their wages were        

D. the prices did ; were their wages    

通常情况下，下列物体属于绝缘体的是（　　）

A．人体

B．大地

C．食盐水

D．空气