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1. 请完成剑八 TEST 1、TEST 2，剑六 TEST 3，剑五 TEST 2 中小作文的写作。
雅思 4.0 方法课作业
雅思 4.0 方法课作业
1. The pie chart shows that there are four main causes of farmiand becoming dagraded in the world today.Globally 65% of degradation is caused by too much animal grazing and tree clearance,constituting 35% and 30%respectively.A further 28% of global degradation is due to over-cultivation of crops.Other causes account for only 7% collectively.[br]These causes affected different regions differently in the 1990s,with Europe having as much as 9.8%of degradation due to deforestation,while the impact of this on Oceania and North America was minimal,with only 1.7% and 0.2% of land affected respectively.Europe,with the highest overall percentage of land degraded(23%),also suffered from over-cultivation(7.7%) and over-grazing(5.5%).In contrast ,Oceania had 13% of degraded farmland and this was mainly due to over-grazing(11.3%).North America had a lower proportion of degraded land at only 5%,and the main causes of this were over-cultivation(3.3%)and,to a lesser extent,over-grazing(1.5%)[br]Overall,it is clear that Europe suffered more from framlend dagradation than the other regions,and the main causes there were deforestation and over-cultivation.