Though expensive,a sofa made of genuine leather lasts longer than _____made of artificial leather

问题描述:

Though expensive,a sofa made of genuine leather lasts longer than _____made of artificial leather
A.it B.those C.one D.that
为什么选C呢?
The information on the Internet gets around much more rapidly than ______ in the newspaper.
A.it B.those C.one D.that
为什么这道题选D,这两道题的区别是什么呢?

one 是类指,泛指某一类.但是在比较级中than 后面不是that指代前面提到的物吗?that=the one,句子中不是特指