You didn't let me drive. If we________ in turn, you__________so  tired. [ ]

A. drove; didn't get          

B. drove; wouldn't got

C. were driving; wouldn't get  

D. had driven; wouldn't have got.

某一细菌，根据初步生化反应和试探性诊断血清玻片凝集试验可初步鉴定为志贺菌属。

凡生化反应符合志贺菌属特征，且与志贺菌属4种多价血清及某一单价血清呈阳性凝集反应，进一步进行的试验是（）

A.血清学分型鉴定

B.兔肠段结扎试验

C.平板毒力试验

D.小白鼠毒力试验

E.豚鼠角膜试验