单项选择题
Is the ladder all right at this height?()
A.梯子合适吗? B.梯子高吗? C.梯子这么高可以吗? D.梯子太高还是太低?
单项选择题 Mind your head .I am dropping the light line now.()
单项选择题 Pilot boat is approaching your vessel.()
单项选择题 The pilot asks the quartermaster to change the steering mode from autopilot to manual.()