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先直接贴上题目和官方解释：
A proposed change to federal incometax laws would eliminatedeductions from taxable incomefor donations a taxpayer has made to charitable and educational institutions. If this change were adopted,wealthy individuals would no longer be permittedsuch deductions. Therefore, many charitable and educational institutions would have to reduce services,and some would have to closetheir doors. The argument above assumes which of the following? A. Without the incentives offeredby federal income tax laws, at least some wealthy individuals would not donate as much money to charitable and educational institutions as they otherwise would have. B. Money contributed by individuals who make their donationsbecause of provisions in the federal tax laws provides the only source of funding for many charitable and educational institutions. C. The primary reason for not adoptingthe proposed change in the federal incometax laws cited above is to protectwealthy individuals from havingto pay higher taxes. D. Wealthy individuals who donate money to charitable and educational institutions are the only individuals who donate money to such institutions. E. Income tax laws should be changed to make donationsto charitable and educational institutions the only permissible deductions from taxable income.
Reasoning What must be true in order for the given information to justify the conclusion that the proposed change in tax laws would force charitiesand schools to reduce servicesor dose down? The passagestates only one premise: that the changewould deny wealthyindividuals tax deductions for contributing to charities and schools. To reach the conclusion from this premise, the argumentimplicitly assumesthat denying the wealthy individuals the tax deductions would reducetheir contributions to many charities andschools; that reduced contributions from wealthy individuals wouldreduce overall revenues for many charitiesand schools; and that reduced revenues would force many charitiesand schools to reduce services or close down. Considerthe answer optionsand find one that statesor follows from one of these assumptions. A. Correct. This follows from the first implicit assumption mentionedabove, that denying wealthy individuals the tax deductions would reduce their contributions to many charities and schools. B. This need not be true. Even if all charities and schools get some money from sourcesother than these contributions, many charities and schoolsmight still depend mainly on the contributions. C. The argument does not addressthe motives behind the proposed change, only its likely effects. D. Even if poorer individuals also donate money to these institutions, the bulk of the donations may come from wealthy individuals. E. The argument does not discusshow the tax laws should be changed,only the likelyeffects of the proposed change.
这题A是可以选出来，但请问BD为什么错呢？我对这种assumption真的好头晕。。CR是整个V里面最难的我感觉，虽然上次考试CR分最高，但应该不少得益于机经。最近狂看Nature上的科学杂志，看阅读有了明显提示，但读起CR的句子真的毫无抵抗力啊。。还有几天考试了，求急救  | 
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发表于 2015-11-29 20:16:53
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