市长在开幕式上揭幕了这座新纪念碑。

The mayor ___unveiled the new monument at the opening ceremony.

市长在新闻发布会上公布了新的城市发展规划。

The mayor ___unveiled the new urban development plan at the press conference.

公司在新闻发布会上发布了新款智能手机。

The company ___unveiled its new smartphone model at the press conference.