to sunlight for too much time will do harm to one’s skin.
A. Exposed
B. Having exposed
C. Being exposed
D. After being exposed
网友回答
A. Exposed
B. Having exposed
(答案→)C. Being exposed
D. After being exposed
解析：句意：在阳光下暴晒很长的时间对你的皮肤是有伤害的。expose的宾语后常可接介词to表示“将…暴露于…”; 动词宾语为oneself时,则意为“将自己暴露于…”“使自己受某人的影响”。 那么它的被动的短语就是be exposed to,又因为这里是做主语的所以用be 的动名词形式。故选C。