排除法是考試答題常用的方法，這個技巧同樣適用于雅思考試，在雅思閱讀部分通過排除法來鎖定正確的答案有的時候會比自己苦苦尋找來得容易。下面大家就隨小編一起去看看如何利用排除法吧!
一、 重要干擾項
重要干擾項就是指，這種選項雖然不是正確答案，卻與原文不沖突(或者很難判斷是否與原文沖突)，它們與正確答案看起來比較相似，只不過不如正確答案更準確、更完整或更嚴謹。我們和小編一起來看下面的例子：
In Tarkovsky’s opinion, the attraction of the cinema is that it
A aims to impress its audience.
B tells stories better than books.
C illustrates the passing of time.
D describes familiar events.
我們可以定位到原文的C段和D段，C段提到：The frightened audience could not accept that they were watching a mere picture. Pictures were still, only reality moved; this must, therefore, be reality. In their confusion, they feared that a real train was about to crush them. 這一段文字表達了觀眾當時的反應，觀眾們很難接受自己看到的是圖畫而不是事實。D段提到：The key to that magic was the way in which cinema created a dynamic image of the real flow of events. A still picture could only imply the existence of time, while time in a novel passed at the whim of the reader. But in cinema, the real, objective flow of time was captured. 這段文字描述了電影創造了事件隨時間的發展演變，并且用picture和novel進行類比，強調電影的魔力是讓人清楚地看到事情流暢地隨時間演變。
根據這兩段文字所表達的意思，很多學生會選擇A或B選項，因為原文提及了觀眾、小說(書)的內容。A和B兩個選項與原文所講的內容并不是矛盾或完全不符合的。因此，這兩個選項就干擾了我們正確的選擇。當我們把這兩段文字仔細推敲之后，發現描述觀眾的反應和對比書和電影的區別，都是為了表達電影的魔力在于表達事件隨時間的發展這一主題含義。C項的含義比AB要更準確，因此答案選擇C項。
二、 錯誤干擾項
相比之下，多選題目的錯誤干擾項就較容易識別出來了。我們可以看到，有些題目中，某個選項與原文是直接矛盾的，那么肯定不會選擇它為正確的答案。比如：
A recent survey found that in British secondary schools,
A there was more bullying than had previously been the case.
B there was less bullying than in primary schools.
C cases of persistent bullying were very common.
D indirect forms of bullying were particularly difficult to deal with.
我們看到原文，其中有一句話是：There was less bullying in secondary schools, with about one in twenty-five suffering persistent bullying. 通過這句話，我們可以明顯地判斷出，C項的含義與原文是矛盾的。very common和one in twenty-five的比例是明顯不符的。因此，C選項就是一個錯誤的干擾項，我們可以確定地排除答案是C項的可能性。