Keith: What do you do for fun on weekends?
Janet: I like to go shopping, watch TV and play computer games.And playing computer games has become my favorite activities.
Keith: I hear many teenagers will spend hours and hours sitting at computers. And they don't care about（担心） their own health at all. How about you? 
Janet: I can control myself well. Computers not only can be used to play games, but also can be used to learn new knowledge. I use computer to do more interesting and meaningful thing.
Keith: You are great! Do you like to go hiking and climb the mountains?
Janet: Yes, I do. I enjoy the fresh air! How about go hiking tomorrow?
Keith: Good idea!