Most of the young girls know they should cut down on fat but knowing such a thing isn’t o

问题补充：

Most of the young girls know they should cut down on fat, but knowing such a thing isn’t of much help when it shopping and eating.

A. refers to

B. comes to

C. speaks of

D. focuses on

答案：

A. refers to

(答案→)B. comes to

C. speaks of

D. focuses on

解析：考察固定句式。A提及，谈及，参考；B涉及，谈到；C谈及；D聚焦于；固定句式：When it comes to…当涉及到….；句意：很多女孩子都知道她们应该减肥，但是当涉及到购物和吃的时候，知道这些是没有帮助的。故B正确。