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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 161

—Where did you pick up the stamp?
—It was at the post office ________ we worked in the summer vacation.

A.that
B.where
C.which
D.when
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—Wheredidyoupickupthestamp?—It