1. So the commentators don't just talk about the sport but they chat with each other in a pleasant way.
2. They couldn't talk with each other, because the man only spoke his local dialect.
3. talk with each other
3. Commercial delegates and experts from both sides have visited each other and talk with each other to share experiences.
4. To do exercise with other people makes the atmosphere more lively, and employees can take the opportunity to talk to each other.