单项选择题
A. look down B. put down C. sit down D. thin down
（） just looks like a guard standing on the deck.A.MastB...
单项选择题（） just looks like a guard standing on the deck.
A.Mast B.Master C.Must D.Main deck
（）are used to clean the bridge.A.RagsB.RatsC.RubbishD.D...
单项选择题（）are used to clean the bridge.
A.Rags B.Rats C.Rubbish D.Derricks
Saw dust is used to （）.A. absorb the oilB. repair the d...
单项选择题Saw dust is used to （）.
A. absorb the oil B. repair the derrick C. adjust the boom D. fill the ballast water
