问题

The time and effort he has devoted during the past few years _____ trees in that village are nowconsidered to be very important. [ ]

A: to planting
B: to plant
C: plant
D: planting

正确答案是：

同类题型

Have you seen yesterday’s TV play I think Mary won’t marry the rich man.–I agree. Unless the man finally ________ his mind to help the poor.

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No sooner ______ home ______ I told him the exciting news.

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