单项选择题
We have to wait at the roadstead till（）.
A. there is a free berth B. there are officers and the sailors C. there are motormen and the sailors D.A、B and C
单项选择题 My ship is in （）!
单项选择题 The （）carries people, cargo, and car or truck for short passages.
单项选择题 The（） type of cargo ship is the tanker.
