单项选择题 （）of this Deratting Exemption Certificate is hereby extended until 4th Oct.2008 as the vessel is laden with cargo．

单项选择题 When clearing customs for a foreign voyage，which of the following is processed at the custom’s house and returned to the vessel（）.

单项选择题 According to the Maritime Safety Traffic Law of the People’s Republic of China，which administrative organ in China is in charge of issuing the Certificate of Vessel’s Nationality（）.