2. 外语
  3. For social robots to work successfully, they have to(accept)______by humans.

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

admin2018-07-26  49
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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