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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 1631

----- Have you heard of Earth Day ?
----Yes . The first Earth Day ______ in 1970 to educate us to protect our planet .

A.celebrates B.celebrated C.is celebrated D.was celebrated
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HaveyouheardofEarthDay?Yes.The