她是一家国家电视台的新闻主持人。

She works as a news ___presenter for a national television station.

在主持了一个成功的节目后，他成为了一个受欢迎的儿童电视主持人。

He became a popular children's television ___presenter after hosting a successful show.

突然，体育主持人宣布了一个意外的比分变化。

Suddenly, the sports ___presenter announced an unexpected score change.