单词拼写;根据句意和中文注释,在答题卷相应的横线上写出所给单词的正确形式。
1.ItiswellknownthatUNICEFisan__________________(国际)organization.
2.TomhasgonetoAmericaon___________________(出差).
3.Asthesayinggoes”_____________(知识)ispower.”
4.Howmanyyears’_______________(经验)doyouhaveofteachingEnglish?