—What did you do when you saw the girl     in the flood?

—I did what I could     .

A．struggling; to pull her up

B．struggle; pull her up

C．struggling ; to pull up her

D．struggle;pull up her

行政机关应当建立健全（），通过核查反映被许可人从事行政许可事项活动情况的有关材料，履行监督责任。

A.管理制度

B.法规制度

C.监督制度

D.纪律制度