第一段：
It is a wise father that knows his own child, buttoday a man can boost his paternal (fatherly) wisdom – or at least confirm that he's the kid's dad. All he needs to do is shell our $30 for paternity testing kit (PTK) at his local drugstore – and another $120 to get the results.
看看破折号的后面or at least ，英文的破折号和中文的破折号还是有异曲同工之妙的，都可以表示对前面内容的解释，“或者至少可以”是对破折号前面的意思的一个详解吧？看看说的是什么，confirm 他是孩子的父亲，亲子鉴定，是吧？好了，but要强调的内容是现在一个男人可以确定他是不是孩子的父亲。
看后面，all he needs to do ，他需要做的只是……，这一句是详细的叙述吧，后面提到了很多的钱数，说明后面是一个细节，这一句就是说只要给钱就行了，是吧？
好了，我们看下一段。作者: 海豚宝贝 时间: 10-9-13 08:40
第二段：
More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fog, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public , ranging in price from a few hundred dollars to more than $2500.
Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots .
在这一段中，第一句提到了paternity and kinship testing 是the most popular 的，第二句提到了DNA检测也是……，也是什么？这一段说的是受欢迎的检测吧？
好了，记住这俩受欢迎，看下一段
Most tests require collecting cells by webbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.
But some observers are skeptical, "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," [strike]says[/strike]Trey Duster, a New York University sociologist. [strike]He notes[/strike] that each individual has many ancestors-numbering in the hundreds just a few centuries back. Yetmost ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father's line or mitochondrial DNA, which a passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.
Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.
看到also，就知道这一段是承接上一段的质疑的。说的是什么呀？我们看一下第一句，测试的参照物只是相关的搜集。那么这就是DNA测试的一个缺点了哦
看看后文，说了一句话，又对这句话进行了解释，说了公司所用的DNA数据库并不是系统的搜集的而是来自于不同试验中的数据
之后再没有出现大转折的句子了，我们直接看题目吧作者: 海豚宝贝 时间: 10-9-13 10:06
26.In paragraphs 1 and 2, the text shows PTK's ___________.
A easy availability
B flexibility in pricing
C successful promotion
D popularity with households
第一段和第二段说了PTK什么？我们回头看看
第二段是细节不是我们需要考虑的，对吧，只看第一段提到PTK的地方
all he needs to do is 付钱，是吧
那么选项C和D就都不对了，因为是压根就没有提到的东西
看B选项，灵活的价格，有吗？文中
好像没有吧？一个30元，一个120元，价格可是死死的……
那么就是A了，这个测试是很容易做的，只要有钱就可以了作者: 海豚宝贝 时间: 10-9-13 10:08
27.PTK is used to __________.
[A] locate one's birth place
[B promote genetic research
[C] identify parent-child kinship
[D] choose children for adoption
PTK用来做什么的？还是第一段的内容吧？
原文中是怎么说的？
confirm that he's the kid's dad
那么选项我们应该选什么？
C吧？
这一题太简单了……作者: 海豚宝贝 时间: 10-9-13 10:14
28.Skeptical observers believe that ancestry testing fails to__________.
[A] trace distant ancestors
[B rebuild reliable bloodlines
[C] fully use genetic information
[D] achieve the claimed accuracy
这里说怀疑的观察家们认为家谱测试不能做什么？
文中那里提到了Skeptical observers 呢？
第五段
看看那个观察家的代表说过些什么？
There is a kind of false precision being hawked by people claiming they are doing ancestry testing
说的是结果不够精确是吧？那么答案选什么？D，对不对？
有人会迷糊，为什么不能选A，那么A的不能追溯先祖，B的重建可靠的血统体系，这些是不是都包括在精确度不够里呀？
这里我们也要注意，一个人说话也是有自己的重点的，他说话也会先阐述一下自己的观点，然后举一些例子，所以一个人说了一大段的话，其实也是有他自己的中心的哦作者: 海豚宝贝 时间: 10-9-13 10:23
29.In the last paragraph, a problem commercial genetic testing faces is __________.
[A] disorganized data collection
[B overlapping database building
[C] excessive sample comparison
[D] lack of patent evaluation
问我们最后一段的问题，大家还记得我们最后一段的时候，说了什么吗？测试的一个确定，是吧？
这里就是说测试会面临的一个问题了
我们回到原文去看看
这一段都说了什么内容呀
数据搜集的问题吧？
那是不是C和D就淘汰了？
那么数据到底是杂乱无章呢还是重复呢？
再看原文
原文说了don't rely on data collected systematically，并不是系统的搜集的，那么就是说应该采用系统的搜集
不系统的搜集，对应的是什么？杂乱无章的搜集吧？
那么答案就是A了吧？作者: 海豚宝贝 时间: 10-9-13 10:28
30.An appropriate title for the text is most likely to be__________.
[A] Fors and Againsts of DNA testing
[B DNA testing and It's problems
[C] DNA testing outside the lab
[D] lies behind DNA testing