那位联合国官员就全球卫生问题向大会发表了讲话。

The ___official from the UN addressed the assembly on global health issues.

市政官员们正在为即将到来的选举做准备。

City ___officials are preparing for the upcoming election.

这位高级职员在会议上宣布了公司的新政策。

The senior ___official announced the company's new policy during the meeting.