单项选择题
Water is used to put out （）(普通火).
A. common fire B. electric fire C. oil fire D. fire
单项选择题 At each drill a different person should be in （）(负责)of an extinguisher.
单项选择题 （）(除了) the fire drill, there are also boat drill and emergency drill on board.
单项选择题 （）(放低) the embarkation ladder.
