Human beings could not benefit from experience in an emotionless world due to its lack of______.

A．It hurts our eyes.
B．It hurts our skin.
C．It is harmful to our respiratory system.
D．It can cause cancers.

A．It is a new design to keep people warm in winter.
B．It is closely sea!0d so that cool air cannot go through.
C．It is a new design without exhausting or harming natural resources.
D．It is created for gardening or fanning.