gwd23-Q32不明白选项

Excavations of the
Roman city of Sepphoris
have uncovered numerous detailed mosaics depicting several readily identifiable
animal species:  a hare, a partridge, and
various Mediterranean fish.  Oddly, most
of the species represented did not live in the Sepphoris region when these
mosaics were created.  Since identical
motifs appear in mosaics found in other Roman cities, however, the mosaics of
Sepphoris were very likely created by traveling artisans from some other part
of the Roman Empire.

Which of the
following is an assumption on which the argument depends?

1. The Sepphoris mosaics are not composed
        exclusively of types of stones found naturally in the Sepphoris area.
2. There is no single region to which all
        the species depicted in the Sepphoris mosaics are native.
3. No motifs appear in the Sepphoris
        mosaics that do not also appear in the mosaics of some other Roman city.
4. All of the animal figures in the
        Sepphoris mosaics are readily identifiable as representations of known
        species.
5. There was not a common repertory of
        mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar.

原文大意：

因为——S城的马赛克上出现了异地物种图案

所以——这个马赛克是异地画家画的。

关键词：

因为——异地物种

所以——异地工匠

比较：物种=工匠

答案中应该存在以上两个关键词。

E选项实际上是：There was not a common repertory of mosaic designs which artisans who lived in various parts of Roman Empire were familiar with.

with 修饰的是主语repertory。但GMAT考试中，要求定语从句中的介词要提到联结词which前。而且句子不能以介词结尾。这正是语法的考点之一。

因此，E选项的意思就明白了：罗马帝国的不同地区的工匠们（工匠）并没有一个他们都熟悉的马赛克设计图库（物种图样）。这句话中存在了两个关键词，所以正确。

A的意思是：S城的马赛克并不是仅仅用当地的石料加工而成的。

B的意思是：S城的马赛克所描述的物种并非产于某一特定区域。与E同理，to which...native=which...native to

如果不明白我以上的推理方式，可以看看这个帖子：

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=391171&replyID=&skin=1