A-A+

Once environmental damage it takes many year

2022-08-01 20:47:41 问答库阅读 167 次

问题详情

Once environmental damage , it takes many years for the system to recover.
A．had done
B．is done
C．is to do
D．does

正确答案：B
解析：damage与谓语“做”之间是被动关系，所以用is done。