After an occurrence of oil pollution，what shall be done first by a vessel in Chinese port? （）.

单项选择题Advance freight together with other charges（）due on shipment.

A.is
B.are
C.has
D.have

单项选择题A vessel proceeding to London，England，from New York makes an unscheduled call at the port of Hamilton，Bermuda. What term is used to denote the voluntary departure from the usual course? （）

A.Alteration
B.Deviation
C.Liberty
D.Unscheduled stop

单项选择题A trade custom has been proved to the effect that in trade between Sarawak and Singapore mate’s receipts（）universally adopted as documents of title as in same way as bills of lading.

A.are
B.takes
C.makes
D.has

单项选择题A temporary condition of danger will not make the port （），provided that such condition will not last an unreasonable time.

A.unsafe
B.safe
C.good
D.bad

单项选择题A ship crane which has been idle for a period of over six months shall be inspected to the same standards as a（）.

A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection