注意：此页面搜索的是所有试题
题目内容
（河南财经政法大学-会计学-大学英语4）
[单选题,7.1分] Once environmental damage _________, it takes many years for the system to recover.
A.has done
B.is to do
C.does
D.is done
A.has done
B.is to do
C.does
D.is done
参考答案
