(4) 凭借具有指示作用的形容词或代词来寻找重复

　　Longdale and Stern discovered that mitochondria and chloroplasts ___ a long, identifiable sequence of DNA; such a coincidence could be ___ only by the transfer of DNA between the two systems.

　　A. manufacture.. accomplished B. reveal.. repeated C. exhibit.. determined

　　D. share.. explained E. maintain.. contradicted

　　下半句的such a coincidence说明第一空格的动词填入后应体现为是一种巧合，两个看不懂是什么的、只知道是不一样的东西(非相关专业的绝大部分学生是不太可能认识mitochondria和chloroplasts这两个词的)怎样了一个长的、可以认为是一模一样的DNA序列就是一个巧合呢?当然只有D的 share表示了这个意思。

　　Laws do not ensure social order since laws can always be ___ , which makes them ___ unless the authorities have the will and the power to detect and punish wrongdoing.

　　A. contested.. provisional B. circumvented.. antiquated C. repealed.. vulnerable

　　D. violated.. ineffective E. modified.. unstable

　　Which指代逗号前面的那句话，也就是“法律不保障社会秩序”，这就使得法律怎样呢?当然只有D选项的ineffective符合句意。

　　3. 对于含义晦涩的句子，判断语气或感情色彩是有效地解决方法，有时候甚至是唯一的方法。

　　Johnson never ___ to ignore the standards of decent conduct mandated by company policy if ___ compliance with instructions from his superiors enabled him to do so, whatever the effects on his subordinates.

　　A. deigned.. tacit B. attempted.. halfhearted C. intended.. direct

　　D. scrupled.. literal E. wished.. feigned

　　这句话对于英语阅读能力较差的学生来说，通过正常的阅读理解来做还是有些难度的。但是如果注意到whatever the effects on his subordinates(无论对下级产生什么影响)的语气，就可以判断第一空格填入后应表示johnson干的不是什么好事，唯一符合这一判断的是D选项。

　　Ironically, the party leaders encountered no greater ___ their efforts to build a progressive party than the ___ of the progressives already elected to the legislature.

　　A. support for.. advocacy B. threat to.. promise C. benefit from.. success

　　D. obstacle to.. resistance E. praise for.. reputation

　　如果知道encounter的正确用法，就可以判断第一空格应填入一个负面色彩的词，这样就轻松排除了A、C、E三个选项，结合后面的意思来看，只能选D。

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