Situation: At the track and field stadium, I am joking with my friends. A: Now I ran four laps, so now is the fifth lap, isn't it? B: No, we are on our fourth lap now. we have six laps left. .C: I feel thirsty. After the last goal, let's go through the ground and head towards the changing room .A: Do not you have to cool down? B: For the moment,Let's do one lap for cool down.