In high pace of life we can see a flow of cars running in the streets high ways and sub

问题补充：

In high pace of life, we can see a flow of cars running in the streets, high ways and subways every day.

A. mild

B. rough

C. temporary

D. constant

答案：

A. mild

B. rough

C. temporary

(答案→)D. constant

解析：考查形容词：A. mild温和的，B. rough粗糙的，C. temporary暂时的D. constant连续不断的，句意是：在快速发展的生活中，我们可以看见不断的车流在街上高速和地铁上跑。选D。