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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 479

It has been said that “happiness is like a butterfly, which, when _     _, is always beyond our grasp but which, if you will sit down quietly, may alight upon you."

A.pursuing B.pursued
C.to pursue D.having pursued
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Ithasbeensaidthathappinessisli