The time and effort he has devoted during the past few years trees in that village are now considered to be very important.
A. to planting
B. to plant
C. plant
D. planting
网友回答
(答案→)A. to planting
B. to plant
C. plant
D. planting
解析：考查短语devote…to “致力于”，to为介词后接动词ing形式。所以选A。