喜欢你这个问题!
My classmate,Li Gang,he used to spend all of his money buying foods and games.
He didn't study hard,so parents and teachers worried about him.
But now,he changed a lot.He studies so hard that everyone feels very supriesed!
He takes part in many charities and gives away some money to people who need help.
Maybe you will ask, why?
Because he went to a poor villarge last summer,and he lived there for several days.
He knew that lots of kids couldn't go to school because their family couldn't afford to pay for education.They have to work to make money.
This experience moved him deeply.So,he decided to change!