Advertisements_______thesefactshave

发布时间：2020-07-25 13:43:53

Advertisements _______ these facts have been printed in newspapers and magazines but have not helped muchA.based onB.base onC.to base onD.basing on

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A解析考查非谓语动词。based on these facts作定语，修饰advertisements，be based on以……为基础，选A。
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