在
每篇阅读的插空题的题干都是一样的，如下：
Look at the four squares [■] that indicate where the following sentence could be added to the passage.
题干下方有黑体句，即为待插入的句子，文章中的四个黑色方框即为待插入的位置。考生需要在短时间内快速找出待插入句子应该放置的位置，使句意和逻辑都比较合适。
该类题目考查的是考生对语意、上下文逻辑和某些词的使用方法的整体把握。一般同学的策略是“看句意，凭感觉”，即靠语感做题。语感有的时候确实可以帮我们解题，但是并不是所有情况都适用，因为其他各种因素也都得考虑。纵观那些只靠语感做题的考生，并不一定能够做到所有插空题万无一失。接下来，笔者将给大家具体讲解一下我在课堂上总结研究出来的一些普适性规则，希望对各位有所启发。
一、从指代词入手
待插入的句子必然有很多成分，其中广泛存在的就是指代词，如：this, that, these, those, it, he, she, him, her, the, another, other以及定冠词the。指代词和定冠词必须在所指代的名词出现后才能使用。例如：当我们表达“我有一个苹果的时候”，我们要这样说：I have an apple而不是I have the apple。当我们要用两句话表达“我有一个苹果，这个苹果是绿色的”的时候，我们需要这样写：I have an apple. The apple is green. 而不是I have the apple. An apple is green. 指代词也是如此。根据这样的基本语法规则，我们可以这样总结：只要待插入的句子中出现了指代词或者定冠词，那么所指代名词在四个选项的位置中一定出现过(特殊情况除外)，我们应该把待插入的句子放在该名词在文中第一次提到的后面。然后，再根据句意判断是否通畅，逻辑是否符合即可。如：
We all know that many more people today are right-handed than left-handed. Can one trace this same pattern far back in prehistory? ■Much of the evidence about right-hand versus left-hand dominance comes from stencils and prints found in rock shelters in Australia and elsewhere, and in many Ice Age caves in France, Spain, and Tasmania. ■When a left hand has been stenciled, this implies that the artist was right-handed, and vice versa. ■Even though the paint was often sprayed on by mouth, one can assume that the dominant hand assisted inthe operation. One also has to make the assumption that hands were stenciled palm downward—a left hand stenciled palm upward might of course look as if it were a right hand. ■Of 158 stencils in the French cave of Gargas, 136 have been identified as left, and only 22 as right; right-handedness was therefore heavily predominant.
Look at the four squares [■] that indicate where the following sentence could be added to the passage.
The stencils of hands found in these shelters and caves allow us to draw conclusions about which hand was dominant.
我们看到待插入的句子中有两个关键词：the stencils中的the以及these。但是由于A of B结构中的A若有the出现，the没有太大作用，文章前面不一定会出现相应名词，所以我们可以根据these shelters定位原文中shelters第一次在哪儿出现。通过scanning发现，shelters第一次出现是在第一个方框之后，所以初步确定答案是B。再次阅读上下文，逻辑和句意都挺合适。再次确认，答案是B。
二、从逻辑关系词入手
常见的逻辑关系词有很多，如but, however, nevertheless, because, since, thus, so, in fact(可表示转折或者总结)等。假设待插入句子中出现了but之类表示转折的逻辑关系词，正确答案的前后一定是具有句意转折的，而且正确答案后边的句子是待插入句子but之后所要表达的意思，待插入句子是过渡句。其他逻辑关系可同理推断。如：
Many signals that animals make seem to impose on the signalers costs that are overly damaging. ■ A classic example is noisy begging by nestling songbirds when a parent returns to the nest with food. ■These loud cheeps and peeps might give the location of the nest away to a listening hawk or raccoon, resulting in the death of the defenseless nestlings.■ In fact, when tapes of begging tree swallows were played at an artificial swallow nest containing an egg, the egg in that “noisy” nest was taken or destroyed by predators before the egg in a nearby quiet nest in 29 of 37 trials.■
Look at the four squares [■] that indicate where the following sentence could be added to the passage.
The cheeping provides important information to the parent, but it could also attract the attention of others.
分析：
待插入句子中有but出现，所以正确答案前后一定是有句意转折的，正确答案的后边应该主要讲的是“吸引其他生物的注意”。根据逻辑关系判断，选项B为正确答案。
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