2. 职称英语
  3. Once environmental damage , it takes many years for the system to recover.A

Once environmental damage , it takes many years for the system to recover.A

游客2023-09-25  42
问题 Once environmental damage      , it takes many years for the system to recover.
选项 A、had done
B、is done
C、is to do
D、does
答案 B
解析 damage与谓语“做”之间是被动关系，所以用is done。
转载请注明原文地址:https://tihaiku.com/zcyy/3045448.html
相关试题推荐
随机试题
最新回复(0)