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. es to
C. speaks of
D. focuses on
网友回答
A. refers to
(答案→)B. es 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 es 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。