维也纳国家歌剧院是世界著名的音乐表演场所。

The Vienna State ___Opera is one of the world's most famous venues for musical performances.

演员们正在表演一出歌剧。

The actors are performing an ___opera.

这部歌剧讲述了爱情与背叛的故事。

This ___opera tells a story about love and betrayal.