单项选择题
Take （）of hydrants, fire hoses and nozzles.
A.careful
B.care
C.careless
D.carefully
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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
