再请教一题

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

　　(A) not only by the foods patients eat but also by when the patients eat them

　　(B) by not only the foods patients eat but also by when the patients eat them

　　(C) not only by the foods patients eat but also by time when the foods are eaten

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

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

请问各位应该选哪项？为什么？我不同意书面答案，觉得没有参考价值。

E

not only by what...but also by when...

很漂亮

你的意思？

根据句意,不是所有食物都会让病情加重,所以决定病情加重的是"病人吃了什么",而不是"病人吃的食物";用WHAT更能强调并和WHEN平行.

再者,A选项里WHEN后面的THE PATIENT完全可以用THEY来指代.

也是,by when they eat them不可以. 哈哈.

E的it可以省略么？我觉得一个都不对。

病人吃了什么食物和什么时候吃的食物是加重病情的原因.

IT不能省略.