1. 他写了400多首华尔兹。
    He wrote _____ _____ 400 waltzes.
2. 施特劳斯和莫扎特是两位最重要的作曲家。
    Strauss and Mozart were _____ _____ _____ _____ important composers.
3. 在他6岁前不仅弹钢琴，而且还拉小提琴。
    Before six, he played _____ _____ the piano, _____ _____ the violin.
4. 他在很多城市开音乐会。
    He _____ _____ in many cities.
5. 施特劳斯写哪种音乐？
    _____ _____ music did Johann Strauss write?
6. 除了戏剧外，莫扎特还写了什么？
    What did Mozart write _____ _____ _____ operas?