新PREP-45题

gmatbiguo

The recent decline in the value of the dollar was triggered by a prediction of slower economic growth in the coming year.  But that prediction would not have adversely affected the dollar had it not been for the government's huge budget deficit, which must therefore be decreased to prevent future currency declines.

Which of the following, if true, would most seriously weaken the conclusion about how to prevent future currency declines?

(A) The government has made little attempt to reduce the budget deficit.
(B) The budget deficit has not caused a slowdown in economic growth.
(C) The value of the dollar declined several times in the year prior to the recent prediction of slower economic growth.
(D) Before there was a large budget deficit, predictions of slower economic growth frequently caused declines in the dollar's value.
(E) When there is a large budget deficit, other events in addition to predictions of slower economic growth sometimes trigger declines in currency value.

请问But that prediction would not have adversely affected the dollar had it not been for the government's huge budget deficit, which must therefore be decreased to prevent future currency declines.这句话句子怎么理解啊？
D和E的区别在哪呢？

oisee

哦 是个虚拟语气倒装。
如果没有大规模政府赤字，那个prediction不会对dollar有负面影响。而想阻止进一步的dollar贬值，赤字就必须减少。

gmatbiguo

谢谢啊，但是这个it指代谁呢？我也看出来是倒装了，但是一句不会同时出现两个谓语动词，

But that prediction would not have adversely affected the dollar had it not been for the government's huge budget deficit, which must therefore be decreased to prevent future currency declines.到底是什么成分呢？还有选项D和E的区别是什么呢？

sorcerer

谢谢啊，但是这个it指代谁呢？我也看出来是倒装了，但是一句不会同时出现两个谓语动词，

But that prediction would not have adversely affected the dollar had it not been for the government's huge budget deficit,
which must therefore be decreased to prevent future currency declines.到底是什么成分呢？还有选项D和E的区别是什么呢？

-- by 会员 gmatbiguo (2011/4/4 10:42:19)

had it not been for……还原就是if it had not been for……it应该指的是prediction
意会这句话就行了，要不是government‘s huge budget deficit，那个预言不会负面影响dollar

(D) Before there was a large budget deficit, predictions of slower economic growth frequently caused declines in the dollar's value.
在没赤字之前， 预言会导致美元贬值
(E) When there is a large budget deficit, other events in addition to predictions of slower economic growth sometimes trigger declines in currency value.
当出现了赤字，预言连同其他的事情有时会导致货币贬值

这个argument的结论是缩减赤字以防止货币贬值
先看D，排除了赤字的影响，即没有赤字影响，预言也会导致美元贬值，美元贬值与否与赤字无关，从而削弱了结论
再看E，赤字出现的同时，预言和其他事情导致了贬值，有可能是赤字导致预言或其他事件，总之不能排除赤字的影响。

相比较，D更削弱

gmatbiguo

谢谢哈，这次我明白了~~