四级阅读选词填空题的两原则和五“定”法
助。
以2011年12月四级阅读的选词填空真题为例。文章首段的首句如下：“With the world’s population estimated to grow from six to nine billion by 2050, researchers, businesses and governments are already dealing with the impact this increase will have on everything from food and water to infrastructure (基础设施) and jobs.”根据这句话考生可以了解到
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