[求助]大全229，238，283

weizong

229.        Crises in international diplomacy do not always result from malice; for nations, like individuals, can find themselves locked into difficult positions, unable to back down.

这里for nations ……的for是否为“因为”的解释？ 后面可以跟句子表原因？因为好像前面也有一题是这样的，请大侠帮忙确认一下。

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

(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

E中最后那个it指带什么？

283.        Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.

(A) Even though its per capita food supply hardly increased during

(B) Even though its per capita food supply has hardly increased in

我想问这里的its指带什么呢？是china么？也就是说条件从句的代词并不一定指带主句主语？

蓝夕叶子

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请参考【发帖必读】 GMAT语法区版规   [ 1 2 ]

谢谢.