With Father's Day around the corner, I have taken some money out of the bank ________ presents

for my dad. [    ]

A. buy  

B. to buy

C. buying  

D. to have bought

下列哪项不是现场急救原则（）。

A.先排险后施救

B.先救命后治伤

C.先重伤后轻伤

D.先疏导后救伤

E.以上都不对