将五边形ABCDE按相似比2：1放大后，得到五边形A₁B₁C₁D₁E₁，再将原五边形ABCDE按相似比1：2缩小，得到五边形A₂B₂C₂D₂E₂，则五边形A₂B₂C₂D₂E₂与五边形A₁B₁C₁D₁E₁的相似比为(    )

It was not until fish ____ that the villagers realized the  importance of protecting the river.   [ ]

A. died away      

B. died off    

C. died from  

D. died out