With the world’s population estimated to grow
问题详情
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 an jobs. Underlying all this 【S1】________ 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 【S2】________, sustainable way is the cornerstone of our nation’s energy security, and will be one of the major 【S3】________ of the 21st century. Alternative forms of energy --- bio-fuels, wind and solar, to name a few --- are 【S4】________ being funded and developed, and will play a growing 【S5】________ in the world’s energy supply. But experts say that, even when 【S6】________, alternative energy sources will likely meet only about 30% of the world’s energy needs by 2050.
For example, even with 【S7】________ investments, such as the $93 million for wind energy development 【S8】________ in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels 【S9】________ 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 【S10】________ --- both traditional and alternative.
A stable B solutions C significant D role E progress
F marvelous G included H growth I exactly J consist
K comprise L competitions M combined N challenges O certainly
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【S4】
【S5】
【S6】
【S7】
【S8】
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【S10】请帮忙给出每个问题的正确答案和分析,谢谢!
参考答案
问题 1 答案解析:
H 空前的this表明,这里说的是前面提到的事情。前面在讲述人口的增长以及研究人员、企业等应对这一增长带来的影响,由此可知,此处也应该是说人口的增长,故答案为[H]growth“增长,增加”。本空所填词为前一句出现的increase的近义复现。
问题 2 答案解析:
A 空后的逗号表明,本空应填一与sustainable(可持续的)语义相近的形容词,并列修饰way,备选项中[A]stable“稳定的”符合要求。
问题 3 答案解析:
N 空前的one of和形容词major以及空后的of表明,本空应填一复数名词,[B]、[L]和[N]入选。结合语境,寻找资源以应对需求应该是一种挑战,故答案为[N]challenges"挑战”。[B]solutions"解决办法”和[L]competitions“比赛”均不符合此处语义。
问题 4 答案解析:
O 分析空所在的句子结构可知,本句不缺主干成分,故本空应填一副词,[I]和[O]入选。[I]exactly “精确地;确切地”无法使此处语义通顺,故答案为[O]certainly“当然;必定”,表示“替代能源肯定是正在投资和研发的”。
问题 5 答案解析:
D 空前的a和growing表明,本空应填一单数可数名词,该名词还应与play和in形成搭配,[D]role “作用”符合要求,play a role in…为固定搭配,意为“在……中发挥作用”。
问题 6 答案解析:
M 空前只有关系词when表明,本空应填一非谓语动词,与空后的alternative energy sources构成逻辑上的主谓或动宾关系,[G]和[M]入选。此处应该是说将所有替代能源加起来也可能只会满足30%的世界能源需求,故答案为[M]combined“结合,合并”。
问题 7 答案解析:
C 空后的名词investments表明,本空应填一形容词,[C]和[F]入选。由后面举例提到的$93 million可知,投资应该是很巨大的,故答案为[C]significant“相当数量的”。[F]marvelous“奇迹般的;绝佳的”不符合此处语义,故排除。
问题 8 答案解析:
G 本空出现在such as引导的例子里,该例子为一个名词性结构,由此可知,本空应填一非谓语动词与in…Act一起作$93 million的后置定语,备选项中只剩下[G] included符合要求,用在这里表示“美国复苏与再投资法案中包含的用于风能开发的9,300万美元”,故答案为[G]。
问题 9 答案解析:
K 分析空所在的句子结构可知,本句缺少谓语,由该句的主语important...sources以及前后文的一般现在时态可知,本空应填一原形动词,[E]、[J]和[K]入选。由后面提到的“当今市场的1%”可知,此处应该是说重要的替代能源在市场所占的份额,故答案为[K]comprise“组成,构成”,常用来表示部分构成整体,主语为部分。[J] consist“包含,包括”常用来表示整体包含部分,主语为整体。
问题 10 答案解析:
B 空前的a lot of和空后的both表明,本空应填一复数名词,[B]和[L]入选。由the answer to our future energy needs(解决我们未来能源需求的答案)可知,此处应该是说传统的和替代的解决方案,故答案为[B]solutions“解决方案”。[L]competitions(比赛)不与alternative(供替代的)搭配使用。