快!Both his father and his mother are tea chers...（改成否定句）Both his father and his mother are tea chers...（改成否定句）改成! his father his moth is a do ctor.
问题描述：
快!Both his father and his mother are tea chers...（改成否定句）
Both his father and his mother are tea chers...（改成否定句）改成! his father his moth is a do ctor.
答
neither ...nor