9. It is not known whether bovine spongiform encephalopathy (BSE), a disease of cattle invariably deadly to them, can be transmitted directly from one infected animal to another at all stages of the infection. If it can be, there is now a reservoir of infected cattle incubating the disease. There are no diagnostic tests to identify infected animals before the animals show overt symptoms. Therefore, if such direct transmission occurs, the disease cannot be eradicated by ____
Which one of the following best completes the argument?
(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE
(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease
(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread
(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late
(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected
21. Whenever a major political scandal erupts before an election and voters blame the scandal on all parties about equally, virtually all incumbents, from whatever party, seeking reelection are returned to office. However, when voters blame such a scandal on only one party, incumbents from that party are likely to be defeated by challengers from other parties. The proportion of incumbents who seek reelection is high and remarkably constant from election to election.
If the voters' reactions are guided by a principle, which one of the following principles would best account for the contrast in reactions described above?
(A) Whenever one incumbent is responsible for one major political scandal and another incumbent is responsible for another, the consequences for the two incumbents should be the same.
(B) When a major political scandal is blamed on incumbents from all parties, that judgment is more accurate than any judgment that incumbents from only on party are to blame.
(C) Incumbents who are rightly blamed for a major political scandal should not seek reelection, but if they do, they should not be returned to office.
(D) Major political scandals can practically always be blamed on incumbents, but whether those incumbents should be voted out of office depends on who their challengers are.
(E) When major political scandals are less the responsibility of individual incumbents than of the parties to which they belong, whatever party was responsible must be penalized when possible.
其实，提干中是有E中比较的意思的。
on all parties about equally =>incumbents returned to office
on only one party =>incumbents from that party are likely to be defeated
这里的东西比较主要的是:equally\likely to
其中likely to =~~when possible
我做逻辑是农民出身,全是通过大量做题,做出的感觉.当然,阅读+理解的能力也是必要的.
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