语法分册的第173页的34题

寂寞的自由

34．To read of Adams' lengthy separation from her family， her difficult travels， and her constant battles with illness is to fell intensely how harsh life was even for the so-called aristocracy of Revolutionary times.
B-àA
（A）To read of
（B）Reading about
（C）Having read about
（D）Once one reads of
（E）To have read of
这个题我不明白考点是什么，GMAT考的思路是什么呢？大家帮忙分析一下为什么错，为什么对，最重要的是考点，谢谢大家帮忙

lizaz

句型：To do sth. is to do sth.