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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 363

He is disappointed. He appears ____ what has happened to his competition.

A.knowing B.to know
C.having known D.to have known
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相关知识点

Heisdisappointed.Heappearswhat