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Once environmental damage ______, it takes many years for the system to recover.
Once environmental damage ______, it takes many years for the system to recover.
游客
2023-10-04
66
管理
问题
Once environmental damage ______, it takes many years for the system to recover.
选项
A、is done
B、will be done
C、has done
D、is to be done
答案
A
解析
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