Mr Smith is taking a walk in the park.

Mr Smith is taking a walk in the park.
Mr Smith is taking a walk in the park.Suddenly,he sees something on the grass.It is a ten-yuan note.Mr Smith looks around.There is no one nearby.He quickly walks to the note and picks it up.Then a park keeper comes up to him.The park keeper points to a sign on the grsss.He says to Mr Smithcan't you see the sign over there,sir?It says,"PLEASE KEEP OFF THE GRASS.FINE 10.Now,you should give meten yuan.'对这篇小短文提个小问题,并回答.