单项选择题
When a vessel is alongside the wharf, it’s necessary for the ship to keep a （）hour gangway watch to guarantee the safety of the ship and the cargo.
A.12 B.8 C.24 D.48
单项选择题 The head line is （）(松弛的).
单项选择题 Write down your(名字)（）,boarding time and personal effects.
单项选择题 When you keep a （）(舷梯班), what are your duties?
