单项选择题
Vessels must be（）valid certificate of nationality or certificated of registry or license.
A.acquiring B.with possession of C.required for D.in possession of
单项选择题 Vessels must not “exceed” a speed of 8 knots in this area.（）.
单项选择题 We can hardly accept any marks（）or damage（）the cargo.
单项选择题 We will（）special attention to the dangerous cargo.
