Lesson

  .

 One day, an old man went bear hunting and he discovered a bear that was drinking the lake.

 As expected, he was shot it and he brought back it.

 When he arrived at his home, he went to bed soon, because he was so tired.

 In the middle on the night, he woke up and he read a book, because he could not sleep well. Suddenly, he was killed by the bear.The Bear pretended to be die.
  The man was killed, because he didn't confirm death of bear,so it is important to accomplish to the very end.