氟康唑（）.

A．具有喹啉羧酸结构的药物 

B．具有咪唑结构的药物 

C．具有双三氮唑结构的药物 

D．具有单三氮唑结构的药物 

E．具有鸟嘌呤结构的药物

You can find whatever you need at the shopping centre,_____is always busy at the weekend.

A．that

B．where

C．what

D．which