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

报春花属的花卉在盆栽过程中，根冠要浅载，防止烂根。盆土不能带酸土，不能积水，否则容易导致“（）”现象发生。