Question

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．

1. A.
   to planting
2. B.
   to plant
3. C.
   plant
4. D.
   planting

Answer 1

A
考查动名词，此句的主语是The time and effort，谓语是is considered，而he has devoted during the past few years to planting trees是句子的定语从句，其谓语动词使用了devote…to doing结构，故A项正确。