We were pleased to see that, besides our own villagers, the audience was made up of a fair number of people out of around villages.

A．off around villages

B．off villages around

C．from around villages

D．from villages around

地形起伏较大或城市各区相隔较远时，比较适合采用( )。

A．分区给水系统

B．统一给水系统

C．分区给水系统和局部加压给水系统

D．先分区后统一的多水源给水系统