标志性词语：weaken、undermine、cast doubt on、weakness、threaten、call into question
Editorial: The roof of Northtown’s municipal equipment-storage building collapsed under the weight of last week’s heavy snowfall. The building was constructed recently and met local building-safety codes in every particular, except that the nails used for attaching roof supports to the building’s columns were of a smaller size than the codes specify for this purpose. Clearly, this collapse exemplifies how even a single, apparently insignificant departure from safety standards can have severe consequences.
Which of the following, if true, most seriously weakens the editorial’s argument?
(A) The only other buildings to suffer roof collapses from the weight of the snowfall were older buildings constructed according to less exacting standards than those in the codes.
(B) The amount of snow that accumulated on the roof of the equipment storage building was greater than the predicted maximum that was used in drawing up the safety codes.
(C) Because the equipment-storage building was not intended for human occupation, some safety-code provisions that would have applied to an office building did not apply to it.
(D) The municipality of Northtown itself has the responsibility for ensuring that buildings constructed within its boundaries meet the provisions of the building-safety codes.
(E) Because the equipment-storage building was used for storing snow removal equipment, the building was almost completely empty when the roof collapsed.
C 因为the equipment-storage building不是用来让人居住的，所以有一些办公室建造条款不适用于这个建筑，无关选项
E 当屋顶坍塌的时候，因为the equipment-storage building是用来储备去雪设备的，所以都出去用了，无关选项。
People who do regular volunteer work tend to live longer, on average, than people who do not. It has been found that “doing good,” a category that certainly includes volunteer work, releases endorphins, the brain’s natural opiates, which induce in people a feeling of well-being. Clearly, there is a connection: Regular releases of endorphins must in some way help to extend people’s lives.
Which of the following, if true, most seriously undermines the force of the evidence given as support for the hypothesis that endorphins promote longevity?
(A) People who do regular volunteer work are only somewhat more likely than others to characterize the work they do for a living as “doing good.”
(B) Although extremely high levels of endorphins could be harmful to health, such levels are never reached as a result of the natural release of endorphins.
(C) There are many people who have done some volunteer work but who do not do such work regularly.
(D) People tend not to become involved in regular volunteer work unless they are healthy and energetic to begin with.
(E) Releases of endorphins are responsible for the sense of well-being experienced by many long-distance runners while running.