请教问题: 885-7 & 13

保家为国

7. 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
答案是E, 我选A. E 中的it 是指代什么呢? 为什么A 不对呢? 请指点.


13. In spite of continuing national trends toward increased consumption of specialty foods, agronomists in the Midwest foresee a gradual reversion to the raising of agricultural staples: feed corn and hard red wheat.
(A) a gradual reversion to the raising of agricultural staples
(B) that a gradual reversion back will feature the raising of agricultural staples
(C) a gradual reversion back to the raising of agricultural staples again
(D) a gradual reversion to raise agricultural staples
(E) a gradual reversion into the raising of agricultural staples
答案是A, 我选D.
我的看法: "尽管...持续上涨, ...预见了一个对于这个上涨的逆转"
"to " prep. "对于"
foresee 预见. 用法是foresee sth.
不知道对不对,请大伙给看看.

多谢各位!