单项选择题
（）（不定期船）run in all parts of the world.
A.Barges B.Tramps C.Ferries D.Liners
单项选择题 （）（散货）ships carry large quantities of cargo.
单项选择题 Turn on the anchor ball（）(在晚上).
单项选择题 When the anchor（）（到底）,hoist the anchor ball by day.
