单项选择题
Get ready the mooring machinery, mooring lines and the gangway for （）.
A. loading cargo B. arrival in port C. departure from port D. unloading cargo
单项选择题 National flag should not be （）up.
单项选择题 You should keep national flag（）.
单项选择题 You should slack the mooring lines （）when the wind is big.
