_______environmental damage is done, it takes many years for the ecosystem to recover． A．Even if B．...
2023-02-11 13:12:14 130次 陕西省宝鸡中学2009-2010学年度高二第二学期期末考试 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
_______environmental damage is done, it takes many years for the ecosystem
to recover．
A．Even
if B．If
only C．While D．Once
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