Jack is my classmate. He has changed a lot and made great progress in many ways. He used to hate reading books and spend a lot of time playing computer games. He thought playing computer games was interesting. But now he studies hard. He also likes reading books, because he gets a lot of knowledge from books. He likes reading books about animals best, because he thinks animals are so cute. He used to waste water and electricity. For example, he never turned off the light when he left the room. But now he realizes the importance of protecting the environment. For example, he always goes shopping with a cloth bag. Before he never waited in line for the bus and he used to speak loudly in public places. But now he's polite. He often gives his seat to old people on the bus. He doesn't speak loudly in public places any more. He didn't know how to care for others before. But now he often cares and helps others. In the future, he decides to do some volunteer work. He wants to help those in need.