答案：Tom has changed a lot in the last few years. He used to like reading books and do well in his lessons .He also spent much time studing and doing exercises at school. But now he is so crazy about computer games and watching TV that he has no interest in his schoolwork and doesn't listen to teachers as carefully as before in class. Also, he can't hand in your homework on time and he often sleeps in class. Perhaps playing computer games can make him feel relaxed, but if he spends too much time on it,he will have less time to study. And it may be bad for his health. For example, it can hurt his eyes and hands. I hope he should concentrate more on his schoolwork. Why not take part in some after-school activities when he feels bored? Why not spend more free time chatting with his friends?