14. Economist: Some policymakers believe that our country’s continued economic growth requires a higher level of personal savings than we currently have. A recent legislative proposal would allow individuals to set up savings accounts in which interest earned would be exempt from taxes until money is withdrawn from the account. Backers of this proposal claim that its implementation would increase the amount of money available for banks to loan at a relatively small cost to the government in lost tax revenues. Yet, when similar tax-incentive programs were tried in the past, virtually all of the money invested through them was diverted from other personal savings, and the overall level of personal savings was unchanged.
The passage as a whole provides the most support for which one of the following conclusions?
A. Backers of the tax-incentive proposal undoubtedly have some motive other than their expressed aim of increasing the amount of money available for banks to loan.
B. The proposed tax incentive is unlikely to attract enough additional money into personal savings accounts to make up for the attendant loss in tax revenues.
C. A tax incentive program that resulted in substantial loss of tax revenues would be likely to generate a large increase in personal savings.
D. The economy will be in danger unless some alternative to increased personal savings can be found to stimulate growth.
E. The government has no effective means of influencing the amount of money that people are willing to put into saving accounts.
15. The author criticizes the proposed tax-incentive program by
A. challenging a premise on which the proposal is based
B. pointing out a disagreement among policymakers
C. demonstrating that the proposal’s implementation is not feasible
D. questioning the judgment of the proposal’s backers by citing past cases in which they had advocated programs that have proved ineffective.
E. disputing the assumption that a program to encourage personal savings is needed
14题选项B中，make up for the attendant loss in tax revenues，是怎么得出来的？
15题，premise是指什么？是怎样被challenge的？
谢谢！！
最后一句提到，其他帐户的存款流入该帐户以享受税收优惠，所以这个帐户达到了平衡，弥补了税收损失，而这是以其他帐户的减少的损失为代价的，所以总体来说，The proposed tax incentive is unlikely to attract enough additional money into personal savings accounts to make up for the attendant loss in tax revenues.
所以premise就是其他帐户的钱没有流入到该帐户
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