单项选择题
We are going to carry out an emergency （）.
A.practise B.practice C.drill D.drills
单项选择题 Throw a （）to the person overboard and help him come on board.
单项选择题 （）extinguish oil and electrical fires with water.
单项选择题 （） fire doors, windows, hatches, accesses and ventilators.
