通用会计核算软件一般是指由专业软件公司研制，公开在市场上销售，能适应不同行业，不同单位会计核算与管理基本需要的会计核算系统。

We are confident that the environment ________ by our further efforts to reduce pollution.

A．improves

B．will be improved

C．has improved

D．was improved