单项选择题
A.should hold responsible for
B.should hear in mind
C.should be held responsible for
D.should bear no compensation for
单项选择题 Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.
单项选择题 Any person maintaining a listening watch on a bridge-to-bridge radiotelephone must be able to（）.
单项选择题 Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.