Ⅲ. 根据图片和首字母提示，填写合适的单词并补全对话。

A: Look at the children in the park. What are they doing?
B: Liu Yang and Liu Cong are 1. p football. Li Lei and Wang Nan are 2. r books.
A: What is Han Lin doing?
B: He's 3. f a kite.
A: What are Zhang Hua and Liu Ping doing?
B: They are 4. e apples.

1. laying
2. eading
3. lying
4. ating