【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
答案解析
略
略
A、 so
B、 that
C、 this
D、 same