单项选择题
（）day，pilot flag should be displayed from main mast.
A.From
B.By
C.on
D.With
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相关考题
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单项选择题
（）any sick person on board now apart from the above-mentioned cases?
A.Have
B.Has
C.Is there
D.Are there -
单项选择题
（）any person died on board during the voyage otherwise than as a result of accident?
A.Have
B.Has
C.Has there been
D.Are there -
单项选择题
（）any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local quarantine officer must be notified immediately．
A.If
B.Shall
C.Should
D.Whether
