客服代表耐心地帮助每一位来电者解决问题。

The customer service representative patiently helped every ___caller solve their problem.

办公室里有位访客想见你。

There's a ___caller in the office who wants to see you.

舞会的司仪大声宣布下一支舞曲的开始。

The dance ___caller loudly announced the start of the next song.