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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1799

Research shows that people feel unhappy and worried when they have nothing to do .  _______, the happiest are those who are busy.

A.In short B.In fact C.As a result D.For one thing
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Researchshowsthatpeoplefeelunh