| it肯定不能指代句子吧？987-238，390
238 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
此题看到以前有诸多讨论，尤其是对这个E中的it到底指代什么，有些人说它指代前面的句子，我觉得IT肯定不能指代句子，要指代肯定是指代名词或名词词组，但具体又不确定这里到底指代什么，所以请教大家，麻烦指点下，先谢过拉
390 June, 1981, six teenagers in the village of Medjugorje, Yugoslavia, claimed to have had visions of the Virgin Mary, who they say has continued to appear to them over the ensuing years.
(A) claimed to have had visions of the Virgin Mary, who
(B) claimed to have visions of the Virgin Mary, whom
(C) claimed to have had visions of the Virgin Mary, whom
(D) claimed to have visions of the Virgin Mary, who（A）
(E) had claimed to have had visions of the Virgin Mary, whom
C中THEY SAY 插入语是如何判断出得？？
385．In its most recent approach, the comet Crommelin passed the Earth at about the same distance and in about the same position, some 25 degrees above the horizon, that Halley’s comet will pass the next time it appears.
(A) that Halley’s comet will pass
(B) that Halley’s comet is to be passing
(C) as Halley’s comet
(D) as will Halley’s comet（D省略动词保留相同助动词
(E) as Halley’s comet will do [D]
这里假如that从句中will 后跟得动词与前面主句不一样（即，不是PASS），仍旧省略动词保留助动词嘛？还是需要写成will +该动词得形式了？ | 
