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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 914

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

A.is; has B.is; have C.are; have D.are; has
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Onethirdoftheareacoveredwithtr