Lots of waste has been dumped into the river, which has led to________. [      ]

A. lots of fish having been killed

B. kill lots of fish

C. lots of fish being killed

D. lots of fish to kill

常用的灭火工具是指灭火蒸气、（）和其他灭火工具。

A.消防水、灭火器

B.泡沫灭火器、干粉灭火器

C.消防锹、消防桶

D.毛毡、沙子、石棉被