阅读下列短文，从每题所给的四个选项中，选出最佳选项。
A.
I will never forget what my old headmaster told me. Normally when you are only 15years of age you do not remember most of the things that are preached by your teachers. But, this particular story is one such lesson that I will never forget. Every time I drift off course, I get reminded of this story.
It was a normal Monday morning at an assembly, and he was addressing the students on important things in life and about committing ourselves to what is important to us. This is how the story went:
An old man lived in a certain part of London, and he would wake up every morning and go to the subway. He would get the train right to Central London, and then sit at the street corner and beg. He would do this every single day of his life. He sat at the same street corner and begged for almost 20 years.
His house was filthy, and a stench (恶臭) came out of the house and it smelled horribly. The neighbours could not stand the smell anymore, so they summoned the police officers to
