_______ to sunlight for too much time will do harm to one’s skin, so you should make it a rule to get your skin creamed before going out in summer.

A．Exposed

B．Having exposed

C．Being exposed

D．To expose

Tommy is ____ only child in the family, so his parents make ____ fuss of him.

A．an, \

B．\ , the

C．\ , a

D．the , a