1. 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) (E) not only by what patients eat but also by when they eat it
就奇了怪了,大家谁能说说e 的it 指代的是what,还是what 从句???? 代词能指代从句??? 还有 by when 都行了,那such as when 行吗? 不是都做名次性从句吗???
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