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單項(xiàng)選擇題

Never extinguish oil and electrical fires with （）.

A. water
B. foam extinguisher
C. CO₂ extinguisher
D. portable extinguisher

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單項(xiàng)選擇題

Water is used to put out （）.

A. oil fire
B. electrical fire
C. common fire
D. special fire

單項(xiàng)選擇題

Are all hoses and equipment ready（）?

A. for use
B. to use
C. in use
D. of use