由于og逻辑讨论汇总的链接里，题目不是第80题。我只好来这里另发贴啦：）
The program to control the entry of illegal drugs into the country was a failure in 1987. If the program had been
successful, the wholesale price of most illegal drugs would not have dropped substantially in 1987.
80. The argument in the passage depends on which of the following assumptions?
(A) The supply of illegal drugs dropped substantially in 1987.
(B) The price paid for most illegal drugs by the average consumer did not drop substantially in 1987.
(C) Domestic production of illegal drugs increased at a higher rate than did the entry of such drugs into the
country.
(D) The wholesale price of a few illegal drugs increased substantially in 1987.
(E) A drop in demand for most illegal drugs in 1987 was not the sole cause of the drop in their wholesale
price.
答案选E 我总觉得怪怪的
那位nn把题目和各答案都分析下吧：）
My personal opinion:
when price drops, there are two possibilities: a drop in demand or an increase in supply(or both)
E says drop in demand is not the sole cause => other cause exist, that is supply increases (This is caused by failure in controling of illegal drugs)
请xdjm帮忙解释偶的问题
不能，改了就不对了。
把E取非，A drop in demand for most illegal drugs in 1987 was the sole cause of the drop in their wholesale price，就说a drop in demand是唯一降价的原因，这样就完全削弱了题目的结论：是由于program的failure导致的降价。
如果把唯一去掉就不对了。
My personal opinion:
when price drops, there are two possibilities: a drop in demand or an increase in supply(or both)
E says drop in demand is not the sole cause => other cause exist, that is supply increases (This is caused by failure in controling of illegal drugs)
同意！
这题完全考经济学原理么，就是影响价格的两个因素：供给和需求。
up
这就是文化背景的区别吧……
觉得其实题目想说的东西有时很简单，但就是开始时候理解有偏差
这就是CR最大的难点
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