Not only_______polluted but_______crowded.

A．was the city;were the streets

B．the city was;were the streets

C．was the city;the streets were

D．the city was;the streets were

易导致感染性休克的病原体为（）

A.脑膜炎奈瑟菌

B.铜绿假单胞菌

C.白假丝酵母菌

D.沙门菌属

E.志贺菌属