单项选择题
Ships often become （）(脏). So cleaning is a frequent job on board.
A.clean B.claw C.dirty D.deck
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.
单项选择题 Please （）(擦掉) the wet paint on the deck.
