help!help!The paper factory ______(be)open for 2 years ,it's polluted many rivers.

来源:学生作业帮助网 编辑:作业帮 时间:2024/06/09 04:34:39

help!help!The paper factory ______(be)open for 2 years ,it's polluted many rivers.

has been

have been

楼上 正答。