问题
单项选择题
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
A.so
B.that
C.this
D.same
答案
参考答案：A
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Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
A.so
B.that
C.this
D.same
参考答案：A