Their task is to（）（驾驶） the ship safely.

单项选择题Keep the vessel to the （）(中间)of the channel.

A.port
B.middle
C.head
D.front

单项选择题The after part of a ship is called（）(船尾) .

A.head
B.tail
C.stern
D.quarter

单项选择题Steer（）（北）！

A.south
B.north
C.east
D.west

单项选择题Keep the NO1（）(浮标) on the port side!

A.buoy
B.mark
C.beacon
D.channel

单项选择题----How answers? -----（）(舵很灵) ！

A. No steerage
B. Answers back
C. Answers all right
D. No answer