预习 新知早知道UNIT 2 Natural disastersinjure reaction signal confirm hug document flood inform supply pattern charity signal Destruction shock roll otherwise destination beyond staff downstairs scared powerful donation oddness distance reaction location sharply destruction curiously 一动不动感觉到抱着头，排好队安然无恙笑啊，哭啊，互相拥抱着意识到谢谢观看 THANK YOU!
