单项选择题
Please tell the duty（）(一水) to lower the gangway.
A.OS B.AB C.A or B D.A+B
单项选择题 Tell him to come to the bridge, the master is(等待)（）him.
单项选择题 Would you please （）the mooring lines ?
单项选择题 The master will be back(立即)（）.
