The boat is （）to the water surface.

单项选择题Ready for （）the boat.

A.lower
B.lowering
C.lowered
D.topped

单项选择题We are going to carry out an emergency （）.

A.practise
B.practice
C.drill
D.drills

单项选择题Throw a （）to the person overboard and help him come on board.

A.lifeboat
B.life-raft
C.lifebuoy
D.fire mask

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