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單項(xiàng)選擇題

There is signal light on the （）(桅桿).

A.mast
B.master
C.must
D.derrick

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單項(xiàng)選擇題

There are some （）(貫穿螺栓) in the toolbox.

A. through bolts
B. nuts
C. bolts
D. split pins

單項(xiàng)選擇題

All the （）(金屬板) and paint are to be supplied by the shipyard.

A.plates
B.plastics
C.boards
D.materials