31. Unlike computer skills or other technical skills, there is a disinclination on the part of many people to recognize the degree to which their analytical skills are weak.

(A) Unlike computer skills or other technical skills, there is a disinclination on the part of many people to recognize the degree to which their analytical skills are weak.

(B) Unlike computer skills or other technical skills, which they admit they lack, many people are disinclined to recognize that their analytical skills are weak.

(C) Unlike computer skills or other technical skills, analytical skills bring out a disinclination in many people to recognize that they are weak to a degree.

(D) Many people, willing to admit that they lack computer skills or other technical skills, are disinclined to recognize that their analytical skills are weak.

(E) Many people have a disinclination to recognize the weakneERSONNAME>ssERSONNAME> of their analytical skills while willing to admit their lack of computer skills or other technical skills.

In E, have a disinclination... while willing is grammatically incomplete,

是不是一定要说while they are？

下面还有两个例子：

178. In the last few years, the number of convicted criminals given community service sentences. which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have risen dramatically.

(A) sentences, which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have

(B) sentences, performing specific jobs that benefit the public while being allowed to remain unconfined, have

(C) sentences, performing specific jobs beneficial to the public while they are allowed to remain unconfined, have

(D) sentences which allow them to remain unconfined in their performing of specific jobs beneficial to the public has

(E) sentences allowing them to remain unconfined while performing specific jobs that benefit the public has

答案E使用while performing。

233. Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickneERSONNAME>ssERSONNAME>, sleeping on the job, fatigue among shift workers, and have raised production efficiency in various industries.

(A) fatigue among shift workers, and have raised

(B) fatigue among shift workers, and raised

(C) and fatigue among shift workers while raising

(D) lowered fatigue among shift workers, and raised

(E) and fatigue among shift workers was lowered while raising

答案C使用while raising。

willing这里是形容词,表示"乐意的". 所以如果改完整,不是while they are

willing,应该是while being willing.

thanks a lot !!!

同意。 -ing表示的动作的施动者是句子的主语。而文中的不是-ing形势，而是一个形容词。