some people have not realized something ak common as( ) to the sun for a long time

题目

some people have not realized something ak common as( ) to the sun for a long time
some people have not realized something ak common as( ) to the sun for a long time will do harm to their skin and even causee skin cancer
A exposing B exposed C havingn exposed D being exposed 请大家帮忙分析一下句子成分以及选哪个答案的原因

答案

D
as common as 后是something的同位语从句
expose：使……暴露 根据意思所以用被动 该动词短语be exposed在从句中作主语所以用动名词