单项选择题
A.one B.second C.first D.two
I have some questions about the （）equipment.A.safetyB.s...
单项选择题I have some questions about the （）equipment.
A.safety B.safe C.saving D.save
The fire is out of（） .A.controlledB.controllerC.control...
单项选择题The fire is out of（） .
A.controlled B.controller C.control D.controllable
The air is （）. Don’t enter that area.A.freshB.toxicC.po...
单项选择题The air is （）. Don’t enter that area.
A.fresh B.toxic C.poison
