But for the fact that the firefighters _____ at the spot in time, more people ______ their lives in the fire.

A．arrived; died

B．had arrived; would lose

C．arrived; would have lost

D．has arrived; could have lost

国库集中收付制度的基本内容不包括( )。

A．设置利用国库单—账户体系

B．规范收入收缴程序

C．有效利用财政资金

D．规范支出拨付程序