Experts say to sunlight for too much time will do harm to one’s skin.A. exposedB. having

问题补充：

Experts say to sunlight for too much time will do harm to one’s skin.

A. exposed

B. having exposed

C. being exposed

D. exposing

答案：

A. exposed

B. having exposed

(答案→)C. being exposed

D. exposing

解析：句意：专家说暴露在阳光下太多的时间会损害人的皮肤。考查动名词做主语，而又是皮肤被暴露在阳光下，being exposed是exposing的被动形式，exposed是过去分词多作定语或状语，having exposed作状语，表示动作在先。故选C。

考点: 考查非谓语动词的用法。