1.The flooding the bridge；we can't walk across it forever.
A.destroyed B.damaged
C.harmed D.hurt
解析：考查同义词用法辨析。destroy毁坏的程度严重，不能修复，从forever可以判断。
答案：A
2.After the earthquake passed away， all the villages and towns were .And no being was seen.
A.in ruin B.in ruins
C.at ruins D.for ruins
解析：考查ruin用作名词表示状态的用法。be in ruins 成为废墟，符合句意。
答案：B
