GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 7WL4SM577S8HBEASJ

The primary purpose of the third paragraph of the passage is to A. explain how the land supports life B. explain what happens when soil becomes infertile C. explain why a certain development in the discussion of forests is regrettable D. show that forests are far more than simple collections species E. argue that forests with a small number of species are more important to the support of than forests with many species