A.one B.second C.first D.two
单项选择题I have some questions about the ()equipment.
A.safety B.safe C.saving D.save
单项选择题The fire is out of() .
A.controlled B.controller C.control D.controllable
单项选择题The air is (). Don’t enter that area.
A.fresh B.toxic C.poison
单项选择题Post two lookouts with ().
A.sextant B.compass C.radar D.binoculars
单项选择题Fire in the cabins. Close all fire doors and use the ()powder extinguisher.
A.dry B.wet C.foam D.portable