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單項(xiàng)選擇題

If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）

A.Calling frequency
B.Distress frequency
C.Urgency frequency
D.Working frequency

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單項(xiàng)選擇題

If it（）fine tomorrow，we shall start unloading.

A.to be
B.is
C.will be
D.has been

單項(xiàng)選擇題

I’d like to know something about the cargo condition at the loading port（）detail.

A.at
B.by
C.in
D.on

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