1.关键词重现的关联：如果一个句子与另外一个句子、一个句子与另外一个段落或一个段落与另外一个段落都包含共同的关键词汇，那么他们之间具有最佳关联，而这种最佳关联通过该关键词的重现而实现。同时要注意能与上文和下文重现的关键词数目越多则关联越紧。请看以下的例子：

　　例：After the Civil War, the South suffered from both economic hardship and drastic social change. ____1____ During the post-Civil War era, the Klan was very popular among southern whites.

　　[A] These changes were brought out by the quick abolition of slavery, on which most Southern slave owners depend to make a living and expand their wealth. When their profits dramatically dropped, they harbored profound hatred against the slaves and the north.

　　[B] For centuries, the south had relied on slaves to harvest crops at plantations. When the slaves were freed, the plantations weren’t being worked on anymore, causing the owners to lose a lot of money. When this happened, six former Confederate soldiers started a hate group called the Ku Klux Klan.

　　解答：能让1处与上下文都构成最佳关联的选项是B。因为虽然A选项与1前面的句子有两个关键词重现关联，却没有与1后面的句子相同的关键词；而B选项虽然只有the south与上文构成关键词重现，但同时还有Ku Klux Klan与下文中的Klan构成关键词重现，因此B选项与原文上下文的关联程度要超过A选项与上下文关联的程度，因此成为最佳选项。

　　技巧点拨：不管A选项中到底有多少个关键词与上文关键词构成重现，其关联程度都不能超过B，即便B选项只有一个关键词与上文关键词构成重现，只有一个关键词与下文关键词构成重现。

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