单项选择题
They should take care of the （系泊缆绳）（）.
A. head lines B. mooring lines C. breast lines D. stern lines
单项选择题 Pay attention to the （）（安全）of the gangway.
单项选择题 If our captain is not in his cabin, he must be on the（驾驶台）（）.
单项选择题 Duty sailors will consider the conditions of （装卸货）（）.
