American children have exciting after-school life, a new study says. Many junior and senior students have lots of funny things to do in their free time. More than 57% have activities every day. 82% have activities at least four times a week. American students spend their free time doing sports, or enjoying arts, music and dancing. They like to have life outside school because they can make a lot of friends during their activities. American students like to have life outside school because  _  .
activities outside school are more interesting they can make a lot of friends they don't like school life they are free to do anything outside school