TPO19阅读第三篇第5题

题目

TPO19阅读第三篇第5题
原文
The areas covered by this material were so vast that the ice that deposited it must have been a continental glacier larger than Greenland or Antarctica.Eventually,Agassiz and others convinced geologists and the general public that a great continental glaciation had extended the polar ice caps far into regions that now enjoy temperate climates.For the first time,people began to talk about ice ages.It was also apparent that the glaciation occurred in the relatively recent past because the drift was soft,like freshly deposited sediment.We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.The drift of the last glaciation was deposited during one of the most recent epochs of geologic time,the Pleistocene,which lasted from 1.8 million to 10,000 years ago.Along the east coast of the United States,the southernmost advance of this ice is recorded by the enormous sand and drift deposits of the terminal mor

答案

这个题有点象考研英语了,题目中关键词是infer 显然是暗示和推测,就已给的这一段原文来看,这个A开头的人显然是个已故的学者,他那时候刚开始谈论冰河世纪,是一个概念的提出者,决定选项的原文关键词是“we now"know......