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Thetimeandefforthehasdevotedduringthepastfewyears

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Thetimeandefforthehasdevotedduringthepastfewyears

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. of planting    B. to plant   C. plant    D. to planting

【回答】

D

知识点:非谓语动词

题型:选择题