单项选择题
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
单项选择题 If it（）fine tomorrow，we shall start unloading.
单项选择题 I’d like to know something about the cargo condition at the loading port（）detail.
单项选择题 I have been instructed that on my voyage（），I shall call at Maderra to pick up some cargo.
