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.
81. The argument in the passage would be most seriously weakened if it were true that
(A) in 1987 smugglers of illegal drugs, as a group, had significantly more funds at their disposal than did the country’s customs agents
(B) domestic production of illegal drugs increased substantially in 1987
(C) the author’s statements were made in order to embarrass the officials responsible for the drug-control program
(D) in 1987 illegal drugs entered the country by a different set of routes than they did in 1986
(E) the country’s citizens spent substantially more money on illegal drugs in 1987 than they did in 1986.
I really don't understand these two questions, even after I read the explanations over and over. What is my problem??? Please explain to me why the correct answer is D and B respectively? I really apprepriate your input!!!!
thanks again.
姐姐，你吓我一跳。我想80怎么能选D呢？还以为我短路呢。原来你的答案错了，是E和81是B。
现在应该想明白了吧？如果不明白我再回答。
oh, my mistake. hehe, But I still want you to explain question 80 to me. ok?
assumption题目，90％的答案是排除他因，用否定语气，如果你时间来不及，就猜这类含not的答案。E正好阐述了不是仅仅由于别的原因导致了价格下降，就肯定了是“控制走私不力”导致的价格下降。
assumption两个特征：1、有support作用，是support的子集；2、取非，将导致原文推理不成立。
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