According to a theory advanced by researcher Paul Martin，the wave of species extinctions that occurred in North America about 11,000 years ago，at the end of the Pleistocene era，can be directly attributed to the arrival of humans，i.e.，the Paleoindians， who were ancestors of modern Native Americans. However，anthropologist Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them.Nor were extinctions confined to large animals： small animals，plants，and insects disappeared，presumably not all through human consumption. Krech also contradicts Martin's exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene. Still，Krech attributes secondary if not primary responsibility for the extinctions to the Paleoindians，arguing that humans have produced local extinctions elsewhere.But，according to historian Richard White，even the attribution of secondary responsibility may not be supported by the evidence. White observes that Martin's thesis depends on coinciding dates for the arrival of humans and the decline of large animal species，and Krech，though aware that the dates are controversial，does not challenge them；yet recent archaeological discoveries are providing evidence that the date of human arrival was much earlier than 11,000 years ago. 　3. In the last sentence of the passage， the author refers to “recent archaeological discoveries” (lines 27-30) most probably in order to 　　(A) Refute White's suggestion that neither Martin nor Krech adequately account for Paleoindians' contributions to the Pleistocene extinctions 　　(B) Cast doubt on the possibility that a more definitive theory regarding the causes of the Pleistocene extinctions may be forthcoming 　　(C) Suggest that Martin's， Krech's， and White's theories regarding the Pleistocene extinctions are all open to question 　　(D) Call attention to the most controversial aspect of all the current theories regarding the Pleistocene extinctions 　　(E) Provide support for White's questioning of both Martin's and Krech's positions regarding the role of Paleoindians in the Pleistocene extinctions 老师，我在做这道题的时候，首先定位到最后一句觉得没说什么重点，就有个yet转折，可能这是用来驳斥前面的某些观点的。所以看选项找有没有驳斥的意思的， 发现5个选项全都在驳斥。。。心里慌了往前找。再回去找的时候时间已到。我就随便选了个B（时间一到各种混乱），因为在做这篇文章之前，我大体看了下原文，记住了原文讲的是P反驳M，W反驳P。后来答案我也看明白了，我认为我做这道题的思路出现了偏差，我想问一下应该怎么修正。

老师好…这道CR题错选A能求解释一下么？谢谢！

请教唐瑭老师：og上的题，答案是D，选了A。不明白D为什么对，是因为最后一句的Although强调的是前半句吗？although一般强调后半句还是前半句？

老师这道题不知道该怎么解！我是这么算的 6!/3!*3!得出来的结果再乘以2，等于40，但答案是30，不知道是哪里算错了，还是我理解错了，希望老师解答！

老师图片里是作文的标题和我在规定时间内写的东西，您看看我错误找全了吗？找错的思维有没有跳跃？第一段和第二段的论证可以这样写吗？以及我每次都是三十分钟压线写完，字数也不多，请老师给我提一些思维和写作上的建议，谢谢！

老师这道题题目有点看不懂，算不到B选项，不知道是题目理解错了还是公式用错了，求讲解

老师能讲解一下这道题吗？

老师您好，这道题的题目有一点看不懂，请问是什么意思以及为什么选d？

老师您好，我想问一下这道题E为什么有利于支持文中观点？

@英吉老师，我最近在看您的录播逻辑网课，您不推荐我们回读。但是我在日常练习的时候做不到读一遍就能弄懂句间关系，或者读第一遍有时候连句子一起都不太清楚。那我们想要练就读一遍就可以了解句间关系的能力，并且用在考场的话，平时可以怎样练习呢？

老师请问这个“or”应该怎么算？