Fill in the gaps.

Friends make ... more fun. Having good friends offers many ... benefits. First of all, friends can keep you well. People with ... social ties live longer than people who are not socially active. Friends are also great at making us ... , which is a sure way to calm us down and make us feel happier. Even animals have friends. They form small groups of close friends and larger groups of more distant friends. And animal ... can sometimes even be between species.