For social robots to work successfully, they have to(accept)______by humans.be a

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问题 For social robots to work successfully, they have to(accept)______by humans.

选项

答案 be accepted

解析考查被动语态。空格所在句缺谓语动词，主语they指代social robots，空格后的by humans表明they与accept之问是被动关系。have to后接动词原形，因此要把accept改为表被动的原形be accepted。

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Forsocialrobotstoworksuccessfully,theyhaveto(accept)______byhumans.bea