From         astonished look on his face, I came to realize that he had never thought the performance would turn out to be such      great success.

A．the; a

B．the;不填

C．an; 不填

D．an; a

下列关于胰岛素治疗糖尿病的描述正确的有（）

A.1型糖尿病必须给予外源性胰岛素注射治疗

B.低血糖反应是胰岛素治疗最常见的不良反应

C.混合注射胰岛素时应先抽吸中长效胰岛素

D.胰岛素应放在冰箱冷冻室内保存

E.长效胰岛素注射时间与进餐关系可不严格