Some 80,000 people were reported ________ in the ever recorded worst earthquake in that area last month.

A．were killed

B．to be killed

C．to have been killed

D．being killed

下列灭火剂中，（）在灭火速率、灭火面积、等效单位灭火成本效果三个方面有一定的优越性，因其灭火速度快、制作工艺简单、使用温度范围广等，目前在手提式灭火和固定式灭火系统上得到广泛的应用.

A.气体灭火剂

B.泡沫灭火剂

C.水灭火剂

D.干粉灭火剂