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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 2028

       from the moon, our earth with water         seventy percent of its surface, appears a blue ball.

A.Seen; covered B.Seen; covering
C.To see; covering D.Seeing; covered
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fromthemoon,ourearthwithwaters