GWD-24-37.（CD-10-37）
Fish currently costs about the same at seafood stores throughout Eastville and its surrounding suburbs. Seafood stores buy fish from the same wholesalers and at the same prices, and other business expenses have also been about the same. But new tax breaks will substantially lower the cost of doing business within the city. Therefore, in the future, profit margins will be higher at seafood stores within the city than at suburban seafood stores.
For the purposes of evaluating the argument, it would be most useful to know whether
A. more fish wholesalers are located within the city than in the surrounding suburbs.
B. Any people who currently own seafood stores in the suburbs surrounding Eastville will relocate their businesses nearer to the city
C. The wholesale price of fish is likely to fall in the future
D. Fish has always cost about the same at seafood stores throughout Eastville and its surrounding suburbs.
E. Seafood stores within the city will in the future set prices that are lower than those at suburban seafood stores.
我的想法是:A无关,C无比较,D无结论无关,E和B选谁呢,我觉得E有反对前提之嫌,B说许多商家从农村来城市,是不是鱼的供应增加了,会减少税收但来的城市MARGIN的减少呢,有点象ETS的思路啊,但答案还是E,请教大家.谢谢.
我也选的B 同意楼上的看法 另外
E说城内price比城外price低了，那么在原文假定其他cost不变，而tax的cost大大降低的情况下，根据那个公式profit margin=price-cost可以得到price 和cost都下降了，则哪个变化幅度大就决定了profit margin的增加或减少或不变，有效most useful...
注意D选项，fish has always cost about the same…完成时，说明是在tax break发生时间以前的事情；而E是将来时，和tax break对应，显然E是正确选项！
文章已经很清晰地说明了cost是相同的，D仅仅是重复文章的条件，而E取是或非否可以得到明确的结论。
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