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
E is best. 这里it指what。这题的依据主要是平行，其它四个选项都不如E好。 C 虽不错，但没有 E 简明 , 且被动不如主动。 what patients eat 和 when they eat it 在此 都是名词性从句 what patients eat 相当于 food; when they eat it 相当于 time it 指代 名词性从句 what patients eat E的 it 不能省，eat及物 not only by what patients eat but also by when they eat it= not only by the food that patients eat but also by the time at which they eat it
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发表于 2003-9-9 14:46:00
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