to the sun for too long I think can hurt your skin.A. Being exposedB. To exposeC. Exposi

问题补充：

to the sun for too long, I think, can hurt your skin.

A. Being exposed

B. To expose

C. Exposing

D. Exposed

答案：

(答案→)A. Being exposed

B. To expose

C. Exposing

D. Exposed

解析：句意：我想暴露于阳光下太久会伤害你的皮肤。I think是插入语，可以暂时忽略，可以看出can hurt是这句话的谓语，所以前面的内容是主语，因为be exposed to“暴露于”，所以用be动词的动名词形式，选A。