Theleaderofthefactorytoldusthatverylittle___wasmadeofthewastematerialinthepast.选项：cost,value,usematt
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题目内容：
The leader of the factory told us that very little ___ was made of the waste material in the past.
选项：cost ,value ,use matter .顺便讲下原因,
优质解答
value
价值之意,过去废弃的材料很少能产生价值
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