单项选择题
It should be observed（）the master is not bound to show both the number of packages and the weight.
A.that B.which C.where D.when
单项选择题 It is the responsibility of the person in charge to（）.
单项选择题 It is the responsibility of the Master or person in charge of a ship to ensure that（）.
单项选择题 It is the chief mate’s job（）the tank cleaning operation．
