【单选题】
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
A、 so
B、 that
C、 this
D、 same
题目答案
A
答案解析
略
A、 so
B、 that
C、 this
D、 same