on a clear day, the beautiful scenery gives him a sense of peace.
A. Walking
B. If walking
C. While walking
D. When one is walking
网友回答
A. Walking
B. If walking
C. While walking
(答案→)D. When one is walking
解析:考查句子结构:句意:当在晴朗的日子散步的时候,美丽的风景给他宁静的感觉。逗号后面是简单句,前面是状语,如果是非谓语动词做状语,非谓语动词的逻辑主语应该是主句的主语,但是walk的主语是人,但主句的主语是the beautiful scenery,如果是状语从句的省略,也要求主从句的主语一致,walk的主语是人,但主句的主语是the beautiful scenery,所以不能省略。排除BC项,这句话只能用完整的时间状语从句。选D