给水处理系统按使用目的划分，包括( )。

A．生活用水系统

B．生产给水系统

C．压力供水

D．消防给水系统

Life abroad was not easy for him, and it was several years before he ________ the whole community.

A．had been familiar with

B．got familiar with

C．have been familiar with

D．would be familiar with