in the school campus in spring, we will always noitce a colorful display of flowers.
A. Walk
B. Having walked
C. Being walking
D. Walking
网友回答
A. Walk
B. Having walked
C. Being walking
(答案→)D. Walking
解析：非谓语动词作时间状语。Walk和句子主语we是主谓关系，且和noitce这一动作同时发生，应选Walking。