单项选择题
A.navigate B.operate C.takeover D.drive
Keep the vessel to the （）(中间)of the channel.A.portB.mid...
单项选择题Keep the vessel to the （）(中间)of the channel.
A.port B.middle C.head D.front
The after part of a ship is called（）(船尾) .A.headB.tail...
单项选择题The after part of a ship is called（）(船尾) .
A.head B.tail C.stern D.quarter
Steer（）（北）！A.southB.northC.eastD.west
单项选择题Steer（）（北）！
A.south B.north C.east D.west
