单项选择题
The most modern ship is（）（集装箱船）.
A. dry cargo ship B. container ship C. liquid cargo ship D. refrigerated ship
单项选择题 A few ships carry（）（旅客）.
单项选择题 Some ships have special duties, such as（）（驳船）.
单项选择题 （）（滚装船）have doors at the bow or stern.
