1．We __recycle__ (回收) waste materials such as used bottles and sheets of paper, so that they can be used again.
2．A __greedy__ (贪婪的) man is never content.He wants to have more of something such as food or money than is necessary.
3．Representatives of the two companies will meet tomorrow in an attempt to reach a __settlement__ (协议)．
4．The __instant__ (瞬间) he got the news, Mr Wang hurried out of his house, and drove all the way to the hospital.
5．Because of these qualities, they were __optimistic__ (乐观的) that he would be successful.
