in the fields on a March afternoon, he could feel the warmth of spring.
A. Walking
B. To walk
C. Walked
D. Having walked
网友回答
(答案→)A. Walking
B. To walk
C. Walked
D. Having walked
解析： 考查非谓语动词作状语。动词walk和逻辑主语he之间是主谓关系，所以要用Walking形式，表主动且表示walk这一动作和主句谓语动词feel同时发生。选A。