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單項(xiàng)選擇題

（）extinguish oil and electrical fires with water.

A.Do
B.Did
C.Never
D.Isn’t

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（） fire doors, windows, hatches, accesses and ventilators.

A.Closed
B.Close
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單項(xiàng)選擇題

Inform the bridge and give the alarm at once （）the fire.

A. in case
B. case of
C. in case of
D. in the case of

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