单项选择题
Duty Sailors must greet visitors （）on gangway.
A.polite B.politely C.impolite D.impolitely
单项选择题 They should （）care of anchors to ensure that they are in normal condition.
单项选择题 Please （）.I’ll go and ask him to come.
单项选择题 -How do you do, Chief Officer! -（）
