The old couple often take a walk after supper in the park with their pet dog them.
Ato follow
Bfollowing
Cfollowed
Dfollows
网友回答
A. to follow
(答案→)B. following
C. followed
D. follows
解析：with的宾语后面可加形容词、副词、分词、不定式、名词等作宾补，这儿pet dog与follow构成主谓关系，所以用following.
【考点】非谓语动词