狗和马一起替农夫干活。一天，他们开始讨论彼此的功绩。
“我们狗可真伟大啊！”狗说。“要是他们把你赶出农庄，我才不觉得惋惜呢。耕田、拖车，固然是高尚的活儿，可我从未听说过你还有其它什么功绩。你怎能跟我相比呢？我白天黑夜都不休息。白天我在牧场保护牲口，黑夜里我看守门户。”
“一点不错，”马回答说。“你说的很对。不过要记住，如果没有我耕田，你在这儿就没有什么可看守的了。”
Keys：
They began to discuss each others merits.
Mother for Sale
A native of Ying，capital of the state of Chu，sold his mother．He made entreaties for his mother to the one who bought her．
“My mother is old．Please see that she has enough food and do not illtreat her．”
This was an example of one who wanted to do a small good deed while indulging in a heinous act．
Exercises：
回答下列问题：
①What did he do to the one who bought her mother？
②What did he say to the one who bought her mother？