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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

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單項(xiàng)選擇題

Are all hoses and equipment ready（）?

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

單項(xiàng)選擇題

The foam extinguisher should be used （）.

A. in the end
B. upside down
C. down side
D. on top

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