A.carefulB.careC.carelessD.carefullyTake （）of hydrants,……

单项选择题Water can put out common fires, such as （）.

A.wood，paper
B.textile
C.A+B
D.oil

单项选择题For the duties （）in one emergency, one person may do more than one job and one job may be done by more than one person.

A.assigning
B.assign
C.toassign
D.assigned

单项选择题Seven short blasts continued for one minute means （）.

A. fire alarm
B. boat alarm
C. man overboard
D. emergency alarm

单项选择题Several sand boxes need （）.

A. to repair and renew
B. repairing and renewing
C. repair and renew
D. repaired and renewed

单项选择题When a ship is abandoned, all of the crew members hearing the alarm sounding should put on （）.

A. the life-jackets and carry the belongings first.
B. the life-jackets and carry the lifebuoys first
C. the life-jackets and gather at muster station first
D. the life-jackets and call the captain.