下列加横线词不属于古今异义词的一项是（ ）

ndred percent _______ to your studies, though itcan be lonely and no fun at all, will leave precious marks on your youth

an ad can lead you to buy something you don’t need at all. So you have to be careful.

We must draw our attention ________ the fact that the young don’t look ________ to the old nowadays.[ ]

It is not how much we do but how much love we put into what we do ________ benefits our work most.