Q：The word "it" most probably refers to ________ .
(A) the lack of stable communities.
(B) The breakdown of informal imformation channels.
(C) The increased mobility of families
(D) The growing number of people moving from place to place.(分析：选B项，本题属句际关系推理题型，要善于分析句子结构，As引导的前半部分是状语从句，主句是"the informal flow of information is cut off"，with引导的短语表伴随。详析见《分册》P110页例1答案。)
例2. The manufacturer who increases the unit price of his product by his package size to lower the quantity delivered can, without undue hardship, put his product into boxes, bags, and tins that will contain even 4-iybcem, 8-ounce, one-pound, two-pound quantities of breakfast foods, cake, mixes, etc.
Q：The word"undue" means " ______ "。
（A）improper (B)unexpected (C)adequate (D)excessive(分析：选D项，这属词汇题型，但需要分析句子结构和上下文逻辑。该句看似复杂，但结构容易分析，主语"the manufacturer",谓语"can put",宾语his product, who引导定语从句，that此引导定语从句，without undue hardship介词组作插入部分。句子结构分析好，全句意思就易弄懂，制造商改变包装大小或样式不需要过多的艰辛努力，故选D。)
例3…All this will lead to a population in the twenty first century that is smaller than was feared a few years ago. For those anxious to see world population brang by under ventral the news is encouraging.
Q:The population in the 21st century,arousing to the writer,_____.
(A) will be smaller than a few gears ago.
(B) will not be as small as people expect.
(C) will prove to be a threat to the world.
(D) will not constitute as serious a problem as expected.
（分析：选D项。属逻辑推理型题。考生关键要理解that引导的定语从句意思，然后联系下句，便知D项是正确选项。）
6、因果句常考
命题者常以文中因果句命制一些考查文中两个事件内在的因果关系的试题，或出些概括文意、段意试题。一般以"推理性"题型和主旨大意题型出现，兼顾少量其它题型。表示因果关系的词有：because, since, for，as, therefore, consequently, result in, originate from等。
例3…The primary reason why it was revolutionary is that it led to great social change…(见《分册》P19页例6)
Q：According to the author, the introduction of the composer is a revolution mainly because .
(A) the computer has revolutionized the working of the human mind.
(B) The computer can do the tasks that could only be done by people before.
(C) It has helped to switch to an information technology.
(D) It has a great potential impact on society.
(分析：选D项。属逻辑推理型题。原段首句就交待了没有什么技术发展比计算机革命对我们生活产生的影响要大。然后指出工业革命之所以是一切革命在于它导致了巨大的社会变化。由此可以推断，计算机的诞生之所以是一场革命主要是D项：it has a great potential impact on society.)