题目内容：

mary with her parents often ( )a walk in the park
mary with her parents often ( )a walk in the park after supper.a,has
b,have c,is having d,having

优质解答

A
因为主语是Mary,单三形式
B 是复数
C 进行时不可和often 连用
D 单独一个非谓语动词不可以做谓语