单项选择题 At least one reinspection shall be made on each vessel holding a Certificate of Inspection valid for two years. This inspection shall be held between the tenth and fourteenth months of the duration period of the certificate and shall be（）.

单项选择题 At（）an occasional survey has been carried out．

单项选择题 All the cargo holds must be（）cleaned out（）meet the requirement of the cargo surveyor.