公司明天将就其未来计划发布一项重要公告。

The company will make an important ___announcement about its future plans tomorrow.

我们聆听了校长关于新校规的宣布。

We listened to the principal's ___announcement about the new school rules.

车站有一则公共广播提醒乘客检查车票。

There was a public ___announcement at the station reminding passengers to check their tickets.