1. 请帮我解答~~我把我的疑问也写出来了~~

1.        Cooperative apartment houses have the peculiar distinction of being dwellings that must also operate as businesses.

(A) of being dwellings that must also operate as businesses

(B) of dwellings that must also operate like business

(C) that they are dwellings that must operate like business

(D) that, as dwellings, they must also operate like businesses（A）

(E) to be a dwelling that must also operate as a business

答案是A  可是我觉得相当奇怪的是~~~

as若作preposition    dwelling 应视为人??

as在此题应该是做conj

省略do~~但句意可以推测出相类似的动作??

我觉得B算是可以接受的答案~~且dwelling前更省略了being看起来干净多了

请问??

2.        Building large new hospitals in the bistate area would constitute a wasteful use of resources, on the basis of avoidance of duplicated facilities alone.

(A) on the basis of avoidance of duplicated facilities alone

(B) on the grounds of avoiding duplicated facilities alone

(C) solely in that duplicated facilities should be avoided

(D) while the duplication of facilities should be avoided（E）

(E) if only because the duplication of facilities should be avoided

答案E

E的答案中~~IF 后一个adv phrase  如此一来if phrase  不完整阿???

而A的答案~~preposition短语修饰前面的动作~~为adv这样请问哪里错了??

3.        As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have vastly increased.

(A) the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have

(B) the chips’ circuits more complex, the power of both the chips and the electronic devices they drive has

(C) the chips’ circuits are more complex, both the power of the chips and the electronic devices they drive has

(D) their circuits are more complex, the power of both the chips and the electronic devices they drive have（B）

(E) their circuits more complex, both the power of the chips and the electronic

答案B     the chip’s circuit more complex  ??????

  是名词词组???  Consistent with parallel       ??

4.        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

(C) Despite its per capita food supply hardly increasing over

(D) Despite there being hardly any increase in its per capita food supply during（B）

(E) Although there is hardly any increase in per capita food supply for

B

为什么要用完成式??

简单式的A选项错在哪??

1.distinction of ...的特征；being dwellings解释为：作为dewllings，所以being不能省略；as作介词；

2.if only不同于传统意义上的if从句，而是一种对表达原因的语气加强。

3.当动词相同时，重复出现的可以省略；

4.表达一段时间用完成时比较好；A的时态不合适，且during没有in在表达时间段头尾的比较好。