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單項(xiàng)選擇題

You’d better use （）to remove the oil on the plates.

A.water
B.sand
C.saw dust
D.derrick

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單項(xiàng)選擇題

After leaving the port, we used （）to clean the empty holds and decks.

A. fresh water
B. sea water
C. both A and B
D. ballast water

單項(xiàng)選擇題

Everything on the bridge should （）clean and tidy.

A.kept
B.keep
C.be kept
D.keeping

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