The owner and editor of the newpaper ( is ) to attend the conference.
问题描述：
The owner and editor of the newpaper ( is ) to attend the conference.
The owner and editor of the newpaper 改成 The owner and the editor of the newpaper 是不是就用are
答
是的,前面一句是说这份报纸的老板和编辑是同一个人,用is ；而后一句是指两个人,所以用are