常见的低血糖症，除外（）

A.胰岛素瘤

B.药源性低血糖症

C.胰岛素自身免疫综合征

D.反应性低血糖

E.胰岛素抵抗

It was several minutes before I was            of what was happening.      [ ]

A．know                    

B．realize      

C．wear                    

D．aware