单项选择题
The master of any vessel entering Singapore may （） radio pratique to the Port Health Officer through his local agent.
A.apply to B.apply for C.apply with D.apply in
单项选择题 The master got permission to pump out 500 tons of clean sea water for （）.
单项选择题 The load line certificate is issued by（）.
单项选择题 The Immigration and Naturalization Service is concerned with which document on a vessel making preliminary entry into a U.S. port from a foreign port?（）.
