Mrs Black puts her book on the desk and goes to her 13-year-old son's room. Jimmy is sitting in front of the computer. He is playing a computer game. On the screen is a white dog. Mrs Black is angry. "Oh, Jimmy! You are still playing on the computer. It's half past eleven. Go to bed now. You will (将) be very tired tomorrow. How can you study at school?" Mrs Black says. "But I am playing with the dog. It's a very interesting game," says Jimmy. Mrs Black sits down next to him You are always playing the game on the computer," she says. "I'm sure this is a great game. But I' m afraid you are spending too much time on it. And it's bad for your eyes. It's important to know when to play, sleep and study." After hearing that, Jimmy says sorry to his mother. And then he goes to bed.