90、Keith:Compliance with new government regulations requiring the installation of smoke alarms and sprinkler systems in all theaters and arenas will xost the entertainment industry $25 billion annually. Consequently, jobs will be lost and profits diminished. Therefore, these regulations eill harm the country's economy.

       Laura:The $25 billion spent by some business will be revenue for others. Jobs and profits will be gained as welll as lost.

Laura responds to Keith by ___

(C) suggesting that Kwith's argument overlooks a mitigating consequence.

(E) agreeing with the main conclusion of Keith's argument but construing that conclusion as grounds for optimism rather than pessimism.

答案：C

我同意C做答案。但是，E选项中有一个main conclusion的提法，我想请教一下，是不是指"Consequently,.......Therefore,.........."引导了两个conclusion,其中一个是main,一个是subsidiary的？如果我的理解没错的话，那么哪个是主哪个是次呢？有没有什么规律或标志可循？

我觉得这些观点可以看成是conclusion，main conclusion 就是harm the country's economy

所以不可能是grounds for optimism

个人意见

怎么也瞅着答案E更顺眼。

NN给解释一下E 为什么不对？

注意逻辑的演进顺序：cost 25 billion -> job will be lost and profits disminished -> harm the country's economy

cost 25 billion是论据，先推出一个中间结论，然后再由中间结论推出main conclusion (harm the country's economy, 逻辑线的最后是最终作者要下的结论)

E中说Laura agreeing with the main conclusion, 肯定错，因为Laura的意思本来就是说经济是个整体，这边损失点那边肯定赚点，不会harm the country's economy的