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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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—You seem to have known Dr. Ken for a long time.
—That’s true. ________ he joined our club years ago.

A.Since B.Until C.When D.If
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—YouseemtohaveknownDr.Kenforal