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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 551

The monument was built in honor of the explorer who was believed ________ the big river.

A.to have discovered B.to have been discovered
C.to discover D.having been discovered
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Themonumentwasbuiltinhonorofth