too much ____to the sun is bad for your skin.1 exposure 2 extension 3 exhibition 4 expansion

题目

too much ____to the sun is bad for your skin.1 exposure 2 extension 3 exhibition 4 expansion
答案给的第三个,为什么
怎么有的说选第一个?

答案

第一个答案是对的.第三个答案肯定是错的,毫无道理.
Too much exposure to the sun is bad for your skin.晒太阳过多对你的皮肤不好.
这里的exposure是名词“暴露,接触”的意思.Too much exposure to the sun 是个名词短语,作主语.