Throw a （）to the person overboard and help him come on board.

单项选择题（）extinguish oil and electrical fires with water.

A.Do
B.Did
C.Never
D.Isn’t

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

单项选择题Fire and boat drills are carried out （）.

A.periodically
B.quarterly
C.monthly
D.yearly

单项选择题All the crew must know the locations as well as the （）of the life-saving and fire-fighting appliances.

A.operate
B.operating
C.operations
D.operated

单项选择题What kind of （）can be used for gas and chemical fires?

A.equipment
B.apparatus
C.extinguishers
D.machines

单项选择题Fires can be divided into different （）.

A.kind
B.kinds
C.types
D.B+C

单项选择题We are loading dangerous cargo, no （）, please.

A.smoke
B.smoked
C.smoking
D.to smoke

单项选择题If there is a fire on board, inform the bridge and give the （）at once.

A.sound
B.sounding
C.alarm
D.signal

单项选择题Cast sea anchor to （）the speed of drifting raft.

A.control
B.controlling
C.controlled
D.controls