_________(expose) to sunlight for too much time will do harm to one’s skin

_________(expose) to sunlight for too much time will do harm to one’s skin
_________(expose) to sunlight for too much time will do harm to one’s skin

_________(expose) to sunlight for too much time will do harm to one’s skin
Exposing.
Exposing to sunlight for too much time是一个主语从句
在阳光下暴露太长时间将有损于皮肤.

being exposed

exposing