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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1203

From space, the earth looks blue. This is _______ about seventy-one percent of its surface is covered by water.

A.why
B.how
C.because
D.whether
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Fromspace,theearthlooksblue.Th