A. in case B. case of C. in case of D. in the case of
单项选择题Fire and boat drills are carried out ().
A.periodically B.quarterly C.monthly D.yearly
单项选择题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
单项选择题What kind of ()can be used for gas and chemical fires?
A.equipment B.apparatus C.extinguishers D.machines
单项选择题Fires can be divided into different ().
A.kind B.kinds C.types D.B+C
单项选择题We are loading dangerous cargo, no (), please.
A.smoke B.smoked C.smoking D.to smoke