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参考解析

解析:
functions。考点:名词。空格所在部分中extend…to…“扩展……用于……”,them则指代its commercial spaces,结合句意“……使它们的功能能够适合信息时代的要求”可知,这里是指扩展这些空地的用处或功能,故B项function“功能,运行”最符合文意。

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