1. What is the theme of the opera?
    这个歌剧的主题是什么？

2. There will be an opera on the air this evening.
    今天晚上要广播一出歌剧。

3. “Instead, you have spent an exceedingly dull evening at the opera with a fat man who, instead of having messages slipped into his hand by dark-eyed beauties, gets only an ordinary telephone call making an appointment in his room.
    "然而，你却在歌剧院里陪着个胖子打发了一个极度无聊的夜晚。根本没有什么黑眸美女偷偷将情报塞到他手里，他只是接了一个普通的电话，约在他住的地方见面。