There were many talented actors out there just waiting _____. [ ]

A. to discover

B. to be discovered

C. discovered

D. being discovered

下列哪项不是胰岛素依赖型糖尿病胰岛的镜下改变（）

A.胰岛变小数量减少

B.胰岛细胞进行性破坏，胰岛细胞数减少

C.胰岛细胞间，毛细血管基底膜有淀粉样变性

D.胰岛及周围间质内见大量淋巴细胞浸润

E.有胰岛纤维化