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

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Stand by（）VHF CH16.

A.of
B.on
C.in
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单项选择题

M/V Yanyuan No.1.（）is your course and speed?

A.When
B.Which
C.That
D.What