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Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.

A.to exposeB.exposingC.exposedD.being exposed

C

解析试题分析:考查过去分词做宾语补足语,see+宾语+宾语补足语,the chemical和expose是被动关系,用过去分词做宾语补足语,句意:看见化学物质暴露于阳光下,专家警告工人处理的时候要当心。选C。
考点:考查宾语补足语
点评:宾语补足语如果是动词的话,要考虑动词和它修饰的宾语的关系,是主动关系用现在分词,是被动关系用过去分词。

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