单项选择题
We（）this port for replenishment of fuel oil.
A.is calling at B.are calling at C.is calling on D.are calling on
单项选择题 Stand by（）VHF CH16.
单项选择题 M/V Yanyuan No.1.（）is your course and speed?
单项选择题 When（）the pilot embark?
