单项选择题
A.are B.is C.am D.be
We（）this port for replenishment of fuel oil.A.is callin...
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
Stand by（）VHF CH16.A.ofB.onC.inD.at
单项选择题Stand by（）VHF CH16.
A.of B.on C.in D.at
M/V Yanyuan No.1.（）is your course and speed?A.WhenB.Whi...
单项选择题M/V Yanyuan No.1.（）is your course and speed?
A.When B.Which C.That D.What
