Question

Learning a foreign language is especially difficult for those who have never learned ______before.

答案是哪一个？理由是什么
A. one B. it C. them D. that

Answer 1

A.one
这里指代“某个”
it指上文出现过的特定事物，即同一事物
one则指代与上文事物同属一类中的一个，并不是同一个事物

Answer 2

我的感觉是选B