[求助]大全238

weizong

238.        Dental caries and gingivitis can be exacerbated not only by the foods patients eat but also by when the patients eat them.

(D) by not only the foods that are eaten by patients but also by the times the foods are eaten（E）

(E) not only by what patients eat but also by when they eat it

E中最后那个it指带什么？

新手上路3

       指代what patients eat

mutegirl