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  • 科目:英语
  • 题型:单选题
  • 难度:较难
  • 人气:235

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