Take （）of hydrants, fire hoses and nozzles.

Water can put out common fires, such as （）.

A.wood，paper
B.textile
C.A+B
D.oil

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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

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