根据句意和首字母的提示写出所缺单词,使该句子完整合理

根据句意和首字母的提示写出所缺单词,使该句子完整合理
1.L___One is the easiest in this book.
2.i had a c__and two eggs for breakfast this moring.
3.most of the children e__playing computer games.
4.the great wall in china in one of the eight w___in the world.