Not until the fish died in the river             how serious the pollution was.

A．did the villagers realize

B．the villagers realized

C．the villagers did realize

D．didn’t the villagers realize

公司销售部办公室需要购买一台复印机，除承担日常的文印需求外，考试\大整理\偶尔还需承担小规模的批量复印，比较合适的机型是()

A.便携式个人用复印机;

B.中低档办公型复印机;

C.高速高档型复印机;

D.高速柜式生产型复印机