to sunlight for too much time as the doctors say will do harm to one’s skin.A. Being ex

问题补充：

to sunlight for too much time, as the doctors say, will do harm to one’s skin.

A. Being exposed

B. Having exposed

C. Exposed

D. After being exposed

答案：

(答案→)A. Being exposed

B. Having exposed

C. Exposed

D. After being exposed

解析：从题干可知，句子的谓语“will do”没有主语，而选项A、B和D均不能在句中作主语，它们可以在句中作状语，故均可排除。而选项C为动名词的被动式，符合语境。