急！比较 pp1-50&pp1-142！关于省略助动词

mcfate_777

50.   (27159-!-item-!-188;#058&003134)

 

 

Many teenagers undergo stress, but results of a recent study indicate that the patterns of stress that girls experience are more likely to result in depression than are those that boys experience.

 

 

(A) are those that boys experience

(B) what boys experience

(C) boys' experience would

(D) boys' stress patterns do

(E) stress patterns of boys

 

答案A

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

答案B

 

为什么142题a选项的was可以省略；而50的a选项are不能省 

急问 多谢了

[此贴子已经被作者于2008-10-7 1:02:15编辑过]

mcfate_777

是不是因为50题的 stress 和 depression 都是名词，用are来表示比较的是stress主语；

而142题中的americans和be self-employed前一个是名词，而后一个不是，所以可以省略was，也不会造成歧义？

请nn指教