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單項(xiàng)選擇題

All the rubber bales were separated（）.

A.by grade
B.by a grade
C.by the grade
D.by the grades

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單項(xiàng)選擇題

All the torn bags are treated（）original ones.

A.in
B.as
C.to
D.with

單項(xiàng)選擇題

All these containers will be loaded（）deck.

A.in
B.up
C.above
D.on