一、推理題的標(biāo)志
推理題的題干中一般含有infer, imply, most likely, least likely, probably等詞，分為有共性的推理題和無(wú)共性的推理題兩大類。
二、推理題的做法
對(duì)于無(wú)共性的推理題，也就是題干中無(wú)線索的，一般使用排除法，即根據(jù)各個(gè)選項(xiàng)的關(guān)鍵詞回原文定位，通過(guò)排除法得出正確答案。
對(duì)于有共性的推理題，也就是題干中有線索的，可以先圈定題干中的關(guān)鍵詞，根據(jù)關(guān)鍵詞回原文定位，然后進(jìn)行推理。推理題主要有下列思路：
1.一般對(duì)比推理
ETS設(shè)計(jì)推理題的手段不多，根據(jù)兩個(gè)事物的對(duì)比特征出題是其中之一。問(wèn)其中一個(gè)事物的特征時(shí)，只要將與之形成對(duì)比的另一個(gè)事物的特征否定掉就可以了。例如：
It should be obvious that cetaceans–whales, porpoises, and dolphins–are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of a fluke and blowhole cannot disguise their affinities with land-dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like.
2. Which of the following can be inferred from paragraph 1 about early sea otters?
It is not difficult to imagine what they looked like.
There were great numbers of them.
They lived in the sea only.
They did not leave many fossil remains.
根據(jù)關(guān)鍵詞sea otters定位第四句：However, unlike the cases of sea otters and pinnipeds…，由原文的unlike可知sea otters和pinnipeds兩種動(dòng)物與whales形成對(duì)比，而且很難想象原始的whales的樣子；根據(jù)“一般對(duì)比推理”思路，可以推出“原始的sea otters的樣子不難想象”。第一個(gè)選項(xiàng)表達(dá)了此意，為正確答案。
2.時(shí)間對(duì)比推理
這種思路常被考到。在這種推理中，一般有兩個(gè)形成對(duì)比的時(shí)間段，它們所具有的特征一般相反。當(dāng)題干問(wèn)一個(gè)時(shí)間段的特征時(shí)，只要將與之相反的時(shí)間段的特征否定掉就可以了。
例一：
Basic to any understanding of Canada in the 20 years after the Second World War is the country’s impressive population growth….
…It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through the Western world since the time of the Industrial Revolution.
… It can be inferred from the passage that before the Industrial Revolution
(A)families were larger.
(B)population statistics were unreliable.
(C)the population grew steadily.
(D)economic conditions were bad.
工業(yè)革命之后與工業(yè)革命之前兩個(gè)時(shí)間形成對(duì)比。既然工業(yè)革命之后西方世界的家庭變小了，那么工業(yè)革命之前的家庭一定比較大。因此(A)為正確答案。
推理題的題干中一般含有infer, imply, most likely, least likely, probably等詞，分為有共性的推理題和無(wú)共性的推理題兩大類。
二、推理題的做法
對(duì)于無(wú)共性的推理題，也就是題干中無(wú)線索的，一般使用排除法，即根據(jù)各個(gè)選項(xiàng)的關(guān)鍵詞回原文定位，通過(guò)排除法得出正確答案。
對(duì)于有共性的推理題，也就是題干中有線索的，可以先圈定題干中的關(guān)鍵詞，根據(jù)關(guān)鍵詞回原文定位，然后進(jìn)行推理。推理題主要有下列思路：
1.一般對(duì)比推理
ETS設(shè)計(jì)推理題的手段不多，根據(jù)兩個(gè)事物的對(duì)比特征出題是其中之一。問(wèn)其中一個(gè)事物的特征時(shí)，只要將與之形成對(duì)比的另一個(gè)事物的特征否定掉就可以了。例如：
It should be obvious that cetaceans–whales, porpoises, and dolphins–are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of a fluke and blowhole cannot disguise their affinities with land-dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like.
2. Which of the following can be inferred from paragraph 1 about early sea otters?
It is not difficult to imagine what they looked like.
There were great numbers of them.
They lived in the sea only.
They did not leave many fossil remains.
根據(jù)關(guān)鍵詞sea otters定位第四句：However, unlike the cases of sea otters and pinnipeds…，由原文的unlike可知sea otters和pinnipeds兩種動(dòng)物與whales形成對(duì)比，而且很難想象原始的whales的樣子；根據(jù)“一般對(duì)比推理”思路，可以推出“原始的sea otters的樣子不難想象”。第一個(gè)選項(xiàng)表達(dá)了此意，為正確答案。
2.時(shí)間對(duì)比推理
這種思路常被考到。在這種推理中，一般有兩個(gè)形成對(duì)比的時(shí)間段，它們所具有的特征一般相反。當(dāng)題干問(wèn)一個(gè)時(shí)間段的特征時(shí)，只要將與之相反的時(shí)間段的特征否定掉就可以了。
例一：
Basic to any understanding of Canada in the 20 years after the Second World War is the country’s impressive population growth….
…It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through the Western world since the time of the Industrial Revolution.
… It can be inferred from the passage that before the Industrial Revolution
(A)families were larger.
(B)population statistics were unreliable.
(C)the population grew steadily.
(D)economic conditions were bad.
工業(yè)革命之后與工業(yè)革命之前兩個(gè)時(shí)間形成對(duì)比。既然工業(yè)革命之后西方世界的家庭變小了，那么工業(yè)革命之前的家庭一定比較大。因此(A)為正確答案。