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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1759

At the root of volunteering is the idea ________ one person may have the ability to offer services that can help other people.

A.that B.what C.which D./
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Attherootofvolunteeringistheid