When people engage in activities that help others, their brain releases endorphins, the brain’s natural opiates, which induce in people a feeling of well-being. It has been suggested that regular release of endorphins increases people’s longevity. And a statistic on adults who regularly engage in volunteer work helping others shows that they live longer, on average, than adults who do not volunteer. However, that statistic would be what we would expect even if volunteering does not boost longevity, because___________ Which of the following most logically completes the argument? A In the communities studied, women were much more likely to do regular volunteer work than men were, and women tend to live longer than men do B The number of young adults who do regular volunteer work is on the increase C The feelings of well-being induced by endorphins can, at least for a time, mask the symptoms of various conditions and diseases, provided the symptoms are mild D It is rare for a person to keep up a regular schedule of volunteer work throughout his or her life E Some people find that keeping a commitment to do regular volunteer work becomes a source of stress in their lives 错选了C，答案给的A。A说女士比男士更可能做志愿活动，女士比男士活得长。这不是支持原文了么？可以题目不是应该驳斥吗？

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The Achaemenid empire of Persia reached the Indus Valley in the fifth century B.C., bringing (the Aramaic script with it, from which was derived both northern and ) southern Indian alphabets. A. the Aramaic script with it, from which was derived both northern and B. the Aramaic script with it, and from which deriving both the northern and the C. with it the Aramaic script, from which derive both the northern and the D. with it the Aramaic script, from which derives both northern and E. with it the Aramaic script, and deriving from it both the northern and 老师，上次答疑太卡，我后来听录音还是不太明白，题干不是说script derives from alphabets吗？ derive from 在这里改怎么理解？起源于？今晚有课，听不了答疑，麻烦老师讲解。

还有一个圆柱的的1/2中间切，直径是12ft，高是10ft，打横放的，没有一个半球面，没有一个底面，求表面积？ 另外一道机经和这个特别像，但是这个题说没有一个半球面，没有一个底面，看解析说要多加一个半圆的面积，不明白什么意思，麻烦老师讲解。

If r and s are positive integers, can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits? 1 s is a factor of 100 2 r is a factor of 100 答案是A 这种题应该什么思路？ 不太会，答案没看懂。。。谢谢

at a certain company, a test was given to a group of men and women seeking promotions. If the average （arithmetic mean） score for the group was 80, was the average score for the women greater than 85? 1 the average score for the men was less than 75 2 the group consisted of more men than women. OG上给的答案太难记了，有简单一些的办法看出来吗？ 单看的话觉得是E

The Achaemenid empire of Persia reached the Indus Valley in the fifth century B.C., bringing (the Aramaic script with it, from which was derived both northern and ) southern Indian alphabets. A. the Aramaic script with it, from which was derived both northern and B. the Aramaic script with it, and from which deriving both the northern and the C. with it the Aramaic script, from which derive both the northern and the D. with it the Aramaic script, from which derives both northern and E. with it the Aramaic script, and deriving from it both the northern and 答案是C，错选了D。bringing the script with it 和 bringing with it the script 的区别不太清楚，只是感觉读起来没有后者顺，就把AB排除了。E的and并列在句中没有体现，排除。CD的derive应该指的是script，按理说应该是单数啊，为什么会选C？麻烦老师讲解。

我找的错误里有遗漏或多余的吗？谢谢 The following appeared as part of an article in a magazine devoted to regional life: "Corporations should look to the city of Helios when seeing new business opportunities or a new location. Even in the recent recession, Helios's unemployment rate was lower than the regional average. It is the industrial center of the region, and historically it has provided more than its share of the region's manufacturing jobs. In addition, Helios is attempting to expand its economic base by attracting companies that focus on research and development of innovative technologies." Discuss how well reasoned ... etc. 下面是我找的错误： 1.失业率降低和新商机没有因果关系 2.工业发达不适合吸引高科技 3.即便吸引高科技，也不能证明扩张经济

( Where once the union had acquiesced to the prejudices of its English-speaking members by supporting ) the imposition of an alien tax on immigrant workers, after 1897 the United Mine Workers made a determined effort to enlist Italians and Slavs in its ranks. (A) Where once the union had acquiesced to the prejudices of its English-speaking members by supporting (B) Where once the union acquiesced to it English-speaking members’ prejudice for the support of (C) While once the union had acquiesced to the prejudices of its English-speaking members in support of (D) While once the union acquiesced to its English-speaking members’ prejudice in supporting (E) While once the union had acquiesced to the prejudices of its English-speaking members in its supporting of 答案是A，错选了D。where once该怎么理解，而且时态也很难把握，我是根据后半句的made把用了过去完成时的选项都排除了。麻烦老师讲解。

During Roosevelt's years in office, Black Americans began voting for Democrats rather than Republic in nation electons, but Black support for Democrats at the state and local levels ( developed only after when civil rights legislation was supported by Harry Turman ). A. developed only after when civil rights legislation was supported by Harry Turman B. developed only after when Harry Turman supported civil rights legislation C. developed only after Harry Turman's support of civil rights legislation by Harry Turman D. develops only at the time after the supporting of civil rights legislation by Harry Turman E. develops only after there being Harry Turman's support of civil rights legislation 答案是C，错选了B。感觉C说的好绕，B的错误是only after 和when连用吗？麻烦老师讲解。

( Severe and increasing numerous critics are pointing to deficiencies in the British legal system, deficiencies that seem ) to deny a proper defense to many clients who are charged with crimes. A. Severe and increasing numerous critics are pointing to deficiencies in the British legal system, deficiencies that seem B. Severe and increasing numerous critics point to deficiencies in the British legal system, deficiencies seeming C. Severe and increasingly numerous critics are pointing to deficiencies in the British legal system that seem D. Severe and increasingly numerous critics point to deficiencies in the British legal system seeming E. Severe and increasingly numerous critics are pointing to deficiencies in the British legal system that seem 答案是C，错选了B。感觉后面应该有that seem，但是发现这个形式的ACE都是现在进行时，不明白为什么要用现在进行时。that seem和seeming的区别是什么？increasing numerous critics和increasingly numerous critics表达的意思是不是不同？麻烦老师讲解。