单项选择题
The sweepings and broken dunnages in the holds have to be （）(移开).
A.removed B.remained C.renewed D.reopened
单项选择题 Ships often become （）(脏). So cleaning is a frequent job on board.
单项选择题 It is necessary for her to （）(执行) the general day-to-day repair on board.
单项选择题 Before entering or leaving a harbour, the ship should be given a （）(彻底) cleaning.
