The advice on how to learn a foreign language by Marx is ____.

题目

The advice on how to learn a foreign language by Marx is ____.
A.worthy of taking
B.worth to be taken
C.worth being taken
D.worthy to be taken
为啥选D?

答案

worth是名词,worthy是形容词,这里的句意是马克思对学习外语的指导是有价值的,而且它们的用法是 be worth of doing和be worthy to do,所以选D,请给分