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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1797

Professor Johnson is said _____ some significant advance in his research in the past year.

A.having made B.making C.to have made D.to make
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ProfessorJohnsonissaidsomesign