libretto|librettos

这位作家正在为新的音乐剧创作剧本。

The writer is working on the ___libretto for a new musical.

她正在研究莫扎特歌剧的歌词本。

She is studying the ___librettos of Mozart's operas.

我在看歌剧时总是带着剧本，这样就能跟上歌词。

I always bring the ___libretto to the opera so I can follow the lyrics.