One night, lots of people were running through the streets, shouting and throwing rocks. It was all about a soccer game. They were soccer {#blank#}1{#/blank#} and they were angry that their team had lost an important game. They went completely out of control.

    It's common {#blank#}2{#/blank#} fans to get crazy. So many cities choose to put more police officers on the streets after big games. {#blank#}3{#/blank#} makes fans so crazy?

    Some experts believe it goes back to a long-ago time when humans lived in tribes (部落). These tribes {#blank#}4{#/blank#} each other for food, land and power (权力). You supported your tribe's warriors (武士) because your life {#blank#}5{#/blank#} on them.

    Today's“warriors” are athletes (运动员). Cheering for {#blank#}6{#/blank#} can bring out the same life-or-death feelings. That can be exciting and fun. It also {#blank#}7{#/blank#} problems if the strong feelings last (持续) hours or days after a game has ended.

    On the other hand, some people say that being a sports fan can make you a happier and {#blank#}8{#/blank#} person. Research shows that if you have a strong connection to a team, you might make strong connections with people. Many fans feel a sense of belonging to a group. They are less {#blank#}9{#/blank#} and have more enjoyable social lives.

    {#blank#}10{#/blank#} your favorite teams make you a bit crazy sometimes, it's only because you love them. And that's good — if you can remember that it's only a game.