Industrial buyers are responsible for supplying the goods and services that an organization required for its operations.

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问题 Industrial buyers are responsible for supplying the goods and services that an organization required for its operations.

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答案required—requires

解析 译文:工业买主负责提供企业运作所需的货物和服务。
分析:考查时态。由are可看出本句的基本时态是现在时,讲述的是一般性的事实。故此处不宜用过去时,由于主语an organization是单数形式,应将required改为requires。
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