题目内容：

    Ballet is a special form of art. It's a1.（France）word. It means "to dance". There's no talking or singing in ballet. A2.（dance）can use body language well. With steps, gestures and the expressions on their faces, they can tell3.（story）. Ballet dancers4.（usual）start training at a young age.

Ballet began in Western Europe in the5.（fifteen）century. Today it has become popular all over the world.

Swan Lake is one of the most famous ballets in the world. The dancers express feelings and communicate messages through6.（they）body language. For example, some of the dancers must give people the impression that they're swans. They do this by7.（move）their arms like wings and moving their necks like the long necks of swans.