單項(xiàng)選擇題

Fire and boat drills are carried out （）.

A.periodically
B.quarterly
C.monthly
D.yearly

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單項(xiàng)選擇題

All the crew must know the locations as well as the （）of the life-saving and fire-fighting appliances.

A.operate
B.operating
C.operations
D.operated

單項(xiàng)選擇題

What kind of （）can be used for gas and chemical fires?

A.equipment
B.apparatus
C.extinguishers
D.machines