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　　Section A

　　（空气污染篇）

　　millions die early from air pollution each year. Air pollution costs the global economy more than $5 trillion annually in welfare costs， with the most serious 26__ occurring in the developing world. The figures include a number of costs 27__ with air pollution. Only considering lost income alone amounts to $225 billion a year.

　　The report includes both indoor and outdoor air pollution. Indoor pollution， which includes 28__ like home heating and cooking， has remain 29__over the past several decades despite advances in the area. Levels of outdoor pollution have grown rapidly along with rapid growth in industry and transportation. Director of Institute for Health Metrics and Evaluation Chris Murray 30__ it as an “urgent call to action.” “One of the risk factors for premature deaths is the air we breathe， over which individuals have little 31__，” he said.

　　The effects of air pollution are worst in the developing world， where in some places lost labor income 32__ nearly 1% of GDP. Around 9 and 10 people in low and middle income countries live in places where they 33__ experience dangerous levels of outdoor air pollution.

　　But the problem is not limited 34__ to the developing world. Thousands die prematurely in the U.S. as a result of related ailments. In many European countries， where diesel 35__ have become more common in recent years， that number reaches in the tens of thousands.

　　题目解析：本次四级选词填空相比往年的难度并没有过多差异，单词考察的还是不同词性用法以及词的正确形式的使用。除此之外，根据文章上下文选择符合文章逻辑的正确含义的词依旧是难点。所以，选词填空对于绝大部分的学生来说，应该明确的思路是-缩小选择范围，这样才能最大可能地判断正确选项。缩小选择范围的四个步骤：1.划分词性 2.判断主旨 3.判断词性与形式 4.代入选项

　　1.划分词性。将15个单词根据尾缀划分为四组单词。

　　2.判断主旨。本篇文章延续了今年上半年考过的主题-环境污染。关于主题的判断可根据文章的名词重点捕捉，而无需探究每一个词的含义。

　　3.判断词性与形式。这部分主要结合出题人在设计此类题型时，常用的句式，记住并套用即可。词的形式主要针对的是动词和名词，当判断出词性后，需要判断动词的词性、名词的单复数。

　　4.代入选项。这一步在备选选项大于一个时较难，因为需要考生结合文章的逻辑，选择符合文意的单词，考察学生的词汇量。

　　下面将根据具体的题目，将3、4 步进行说明。