单项选择题 --Good morning, sirs. What can I do for you? --We are the （）. We would like to see your captain.

单项选择题 It’s important for duty sailors to pay attention to the （）of the tide and looking around the ship.

单项选择题 The main tasks for sailors on duty are, first of all, （）persons who come on board to do their business, such as the PSC inspectors, the agent, the ship chandler, etc.