12月英语四级选词填空实例训练（三十一）

　　2013年下半年，英语四级将改革，局部题型发生变化。选词填空在英语四级考试中，是考生们很难逾越的难关，很多考生做到这类题型都会选择直接放弃。其实，只要大量练习，再加上归纳总结，选词填空拿高分并不难。下面小编整理了选词填空题型训练，希望对考生们有帮助。

　　With the worlds 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 and jobs. Underling all this 47 will be the demand for energy, which is expected to double over the next 40 years.

　　Finding the resources to meet this demand in a 48 . sustainable way is the cornerstone of our nations energy security, and will be one of the major 49 of the 21st century. Alternative forms of energy- bio-fuels, wind and solar, to name a few are 50 being funded and developed, and will play a growing 51 in the worlds energy supply. But experts say that even when 52 , alternative energy sources will likely meet only about 30% of the worlds energy needs by 2050.

　　For example, even with 53 investments, such as the $93 million for wind energy development 54 in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels 55 only about 1% of the market today.

　　Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of 56 both traditional and alternative.

　　注意：此部分试题请在答题卡2上作答。

　　A)stable I)exactly

　　B)solutions J)consist

　　C)significant K)comprise

　　D)role L)competitions

　　E)progress M)combined

　　F)marvelous N)challenges

　　G)included O)certainly

　　H)growth

　　答案解析：

　　选词填空：47 growth 48 stable 49 challenges 50 certainly 51 role 52 combined 53 significant 54 included 55 comprise 56 solutions

　　【解析】这是一篇讨论能源资源的说明文，话题是考生比较熟悉的能源问题，不断增长的人口与可再生资源的矛盾该如何解决。文中指出能源的一些可替代形式如生物能源、风能太阳能等可再生资源将在未来发挥越来越重要的作用。但是专家指出，即使这些资源储备量惊人，但是到2050年也只能满足世界30%的需求。文章最后两段探讨了各能源在市场上的需求，以及解决未来能源需求的其他方案。

　　总体来说，这篇文章理解难度不大，填空难度适中，所选词汇也都是四级考纲的词汇。选项较具有干扰项，多为c和s开头的单词，考生在考试时要特别注意。