乐队今晚将在剧院的主舞台演出。

The band will perform on the ___mainstage of the theater tonight.

音乐节今年将把电子音乐作为主打节目。

The music festival plans to ___feature electronic music this year.

新技术在这次展览会上成为焦点。

The new technology took the ___main stage at this exhibition.