单项选择题

（）extinguish oil and electrical fires with water.

A.Do
B.Did
C.Never
D.Isn’t

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单项选择题

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

A.Closed
B.Close
C.Closing

单项选择题

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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