Principle 1：排除与原文相关句主题不一致的选项
主题一致性，是排除法的第一要义。很多题目，仅仅通过主题不一致原则就可以排除得出正确答案。
句子主题，通常体现在名词或动词上。因此审题和排除选项时，首先要关注句子中的核心名词和动词，找寻题目与选项的一致性。
例如上文提及的2011年12月Passage2 Q63：What does the author mean by saying 'money is known… to bring a relationship to its knees' (Line 1 Para.2)?
原文相关句：Since money is known to be one of the things most likely to bring a relationship to its knees, we should be grateful.
题目选项： A) Money is considered to be the root of all evils.
B) Some people sacrifice their dignity for money.
C) Few people can resist the temptation of money.
D) Disputes over money may ruin a relationship.
原文相关句主题为money和relationship之间的关系。据此来考察各个选项：A) 提到money和evil(邪恶)之间的关系，主题不一致，排除。B) 提到人们的尊严(dignity)的问题，主题不一致，排除。C) 提到抵挡(resist)钱的诱惑(temptation)，主题不一致，排除。只有D) 选项提到了money和relationship的关系，保留为正确答案。
难度稍大些的题目，可以多次叠加应用"主题相关"原则做排除。如2011年12月Passage2 Q65：What does Kim Stephenson believe?
本题目利用Kim Stephenson回原文找寻相关句，为第三段落首句：Kim Stephenson, an occupational psychologist, believes money is such a big deal because of what it symbolizes, which may be different things to men and women. 原文相关句可提取出如下主题：a big deal, symbolize, different things to men and women。
题目选项： A) Money is often a symbol of a person's status.
B) Money means a great deal to both men and women.
C) Men and women spend money on different things.
D) Men and women view money in different ways.
通读选项发现，A)含有symbol，B)提到a great deal，C)和D)都提及了different things/ways。因此，必须利用选项中其他主题词做第二轮排除：A)选项提到person's status(社会地位)，原文原句并未提及任何个人背景问题，排除;B)选项both men and women与原文所述different things to men and women不同，排除;C)提及spend money，原文未提到，排除。因此，最终答案为D)。D)选项中view money in different ways含义为"用不同的方式看待钱"，原文句义为"钱对于男人和女人所代表的(symbolize)的东西是不同的"。可见，两句虽转换了描述方式，但基本含义是相同的。