请教两道PREP SC（急！）

According to a 1996 study published in the Journal of Human Resources, Americans of Middle Eastern descent were twice as likely as was the national average to be self-employed.

(A) as was the national average to be self-employed

(B) as the average American to be self-employed

(C) as the national average that they would be self-employed

(D) to be self-employed than was the average American

(E) that they would be self-employed than was the national average

答案选B。为什么A不对啊？as...as后补出助动词was不是很好吗？

The computer company registered a $16 million net loss for the year, largely because it was profitable only overseas, where much of their profits were used for paying higher taxes, while continuing to lose money in North America.

(A) where much of their profits were used for paying higher taxes, while continuing

(B) where much of their profits went to pay higher taxes, as they continued

(C) where much of its profit went to pay higher taxes, while it continued

(D) with much of their profits going to pay higher taxes, while continuing

(E) with much of the profit used for paying higher taxes, as it continued

答案选C。为什么E不对呢？overseas是副词，用where定从修饰合适吗？我倒觉得独立主格更好。

我是这样理解的：

1 此句没有宾语，只是主语和主语的比较，本身省略主动词会更简洁。

2 A中，是人（Americansof Middle Eastern descent)和 the national average（这里可以理解成为一个抽象的概念）比了，而不是人(descent)和人（average Americans)比。

3 在看，american s of middle eastern descent/ the average american多对称啊。

哪位能在帮忙看看，急！

A 多了was，was需要省略。

GWD里有类似的一道，GWD-10-1

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

A. minority graduates are nearly four times more likely than are other graduates in planning to practice

B. minority graduates are nearly four times more likely than other graduates who plan on practicing

C. minority graduates are nearly four times as likely as other graduates to plan on practicing

D. it is nearly four times more likely that minority graduates rather than other graduates will plan to practice

E. it is nearly four times as likely for minority graduates than other graduates to plan to practice

第2题我觉得用with不明确，说不清那里在挣钱，那里在交税！不如C清晰！  ABD中their错误。