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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1912

_____a written permission, he had to write another letter to the president of the university.

A.Not giving B.Not having been given
C.Having not given D.Having not been given
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相关知识点

awrittenpermission,hehadtowrit