编辑点评： GRE写作需要大家积累一定的写作素材、锻炼自己的逻辑思维、多多积累一些有用的句子和词汇，有了这些基础以后，就需要大家根据真题来进行练习写作了。
Humans arrived in the Kaliko Islands about 7,000 years ago, and within 3,000 years most of the large mammal species that had lived in the forests of the Kaliko Islands had become extinct. Yet humans cannot have been a factor in the species extinctions, because there is no evidence that the humans had any significant contact with the mammals. Further, archaeologists have discovered numerous sites where the bones of fish had been discarded, but they found no such areas containing the bones of large mammals, so the humans cannot have hunted the mammals. Therefore, some climate change or other environmental factor must have caused the species extinctions.
Write a response in which you examine the stated and/or unstated assumptions of the argument. Be sure to explain how the argument depends on these assumptions and what the implications are for the argument if the assumptions prove unwarranted.
中文翻译：
大约7000年前人类到达了Kaliko岛，在3000年内曾经生活在Kaliko岛的树林中的大型哺乳动物绝大多数已经灭绝了。然而人类并不是导致这些物种灭绝的因素，因为没有证据表明人类与这些哺乳动物有很多接触。而且，考古学家发现一些有大量鱼骨被抛弃的场所，而他们并没有发现存在大型哺乳动物骨头的类似场所，因而人类并没有猎杀这些哺乳动物。因此，一定是一些气候上的变化或其他环境因素导致了这些物种的灭绝。
写一篇回应，在其中检视文章的论证中述及和/或未明确述及的假设，务请解释文章的论证是如何依赖于这些假设的，并指出如果这些假设不成立会对文章的论证带来何种影响。
此上就是为大家提供的新版GRE写作新题库Argument部分的内容，希望大家能够在练习中提高自己的写作水平。