各位老师好,下面这个句子里,parents的格用的对不对?是不是应该用名词属格,parents'的形式?谢谢老师。Parents making sure children’s security by using GPS may hinder the development of teenagers’ independence.
a metallic surface = a surface like that of metal显然,这里的that=the surface, 对吗?可是为什么不能用one代替a surface,即a surface like one of metal 呢?或者我的疑问是为什么这里要用that=the surface特指呢?