单项选择题

Detach the fore and aft side hooks, （）the fore and aft boat nests.

A. take in
B. take on
C. take off
D. take down

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单项选择题

Take （）of hydrants, fire hoses and nozzles.

A.careful
B.care
C.careless
D.carefully

单项选择题

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

A.wood，paper
B.textile
C.A+B
D.oil

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