先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    In a small village，there lived a poor man．He was smart but1,and he never worked. The villagers were so2that they often gave him some useful things. So the man could3with those things.

    One day morning，the man begged(乞讨) from door4door again．He wanted some food．5，he got a large bag of flour(面粉)from an old woman．After he went home，he put the flour into a large pot(罐子)and6it near his bed．Then he went to7．In his dream，he sold the flour at a very good8．With the money，he bought a cow ,and its milk9him more money．He was so happy in his dream that he danced in his sleep．His10hit(碰撞)the pot of flour, and the flour spilt (洒出)all over the floor．The man woke and he felt so sad．

    This thing taught him a lesson：no one can live a good life without working．From then on he worked every day and had a better life．

曲线y=2sinx在点P（π，0）处的切线方程为 （   ）

我们要像爱护自己的眼睛一样爱护个人信用，那是因为（    ）

①讲信用的人能赢得他人的帮助和支持   ②坦诚的人容易在事业上取得成功

③能够促进社会发展与文明进步               ④谎言在任何时候都没有好结果