.The house rent is increasing sharply nowadays. I’ve got about half the space I has five years ago but I am paying  D  now.

A．as five times much

B．as much five times

C．much as five times

D．five times as much

如果关于x的不等式|x-3|+|x-4|＜a的解集不是空集，求参数a的取值范围．