单项选择题
（）（货船）can be divided into two basic types.
A. Cargo ships B. Oil ships C. Gas carriers D. Tramps
单项选择题 The most modern ship is（）（集装箱船）.
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）.
