[-C33] ____to sunlight for too much time will do harm to one’s skin.

问题描述:

[-C33] ____to sunlight for too much time will do harm to one’s skin.
A.Exposed
B.Having exposed
C.Being exposed
D.After exposed
为什么选C不选A?

C.Being exposed 是对的.
这个句子缺少主语,而A.Exposed 是过去分词,是不能做主语的.只有C.Being exposed 动名词(的被动语态),才可以做主语.