单项选择题 -Will you take me to see your chief officer? -Sorry, he has gone （）. Would you like to leave a message for him?

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.