单项选择题
Everything on the bridge should （）clean and tidy.
A.kept B.keep C.be kept D.keeping
单项选择题 Decks, superstructure and hand rails may be washed with （）water at sea.
单项选择题 The sailor keeping （）watch should clean the gangway, the rails, bulwark and the spaces around the gangway.
单项选择题 The sailor taking （）watch should do cleaning work on the bridge.
