be on another line meaning in English

在接另一个电话

I ' m sorry , he is on another line right now . will you hold the line , please
对不起，他现在在接另一个电话。请稍候好吗？
I am afraid mr . hao is on another line . could you hold the line , please
不好意思，郝先生正在接电话。请您稍等一下好吗？
I am afraid mr . hao is on another line . could you hold the line , please
不好意思，郝先生正在讲电话。请您在线上稍侯好吗？
A : i ' m sorry , he is on another line right now . will you hold the line , please
对不起，他现在在接另一个电话。请稍候好吗？