It is dark.Miss Lee turns on the light.Why____Miss Lee turn on the light?横线上是填does吗?如果是,那Why does Miss Lee turn on the light,turn需要加“s”吗?

It is dark.Miss Lee turns on the light.Why____Miss Lee turn on the light?横线上是填does吗?如果是,那Why does Miss Lee turn on the light,turn需要加“s”吗?
It is dark.Miss Lee turns on the light.Why____Miss Lee turn on the light?横线上是填does吗?
如果是,那Why does Miss Lee turn on the light,turn需要加“s”吗?

It is dark.Miss Lee turns on the light.Why____Miss Lee turn on the light?横线上是填does吗?如果是,那Why does Miss Lee turn on the light,turn需要加“s”吗?
是填does,turn不必加s（三单已由does体现）
因为,一般现在时肯定句转特殊疑问句格式：特殊疑问词+does/do+主语+动词原形（+其它）.