请教PREP1-142

142.
            (32496-!-item-!-188;#058&006253)

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

 B 还是不明白national average怎么表意不清了?

我想这里应该是Americans of Middle Eastern和average American比较，所以AC选项中的national average表意不清了，没有说清楚是什么在和前面的Americans比较。

比较应该一致~

前面是复数 后面用was...就不一致了 而B就消除了不一致

顶！请ＮＮ看一下Ａ中the national averagea　怎么不平行？

这里的不要was是不是因为是主语比较，没有歧义一定要省略？

可是B中American也是单数呀！

这道题到底怎么解释呢？

复数可以跟单数比较吗？

名称 总称(谓语用复数） 一个人 两个人
中国人 the Chinese a Chinese two Chinese
瑞士人 the Swiss a Swiss two Swiss
澳大利亚人the an two
Australians Australian Australians
俄国人 the Russians a Russian two Russians
意大利人 the Italians an Italian two Italians
希腊人 the Greek a Greek two Greeks
法国人 the French a Frenchman two
Frenchmen
日本人 the Japanese a Japanese two Japanese
美国人 the Americans an American two Americans
印度人 the Indians an Indian two Indians
加拿大人 the Canadians a Canadian two Canadians
德国人 the Germans a Germans two Germans
英国人 the English an Englishman two
Englishmen
瑞典人 the Swedish a Swede two Swedes