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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1771

The time and effort he has devoted during the past few years____ trees in that remote area is now considered to be of great value.

A.to plant B.to planting C.plant D.planting
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Thetimeandefforthehasdevoteddu