Though it may seem as if more than a century of________has made the electrical grid an allencompassing web connecting the whole

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问题 Though it may seem as if more than a century of________has made the electrical grid an allencompassing web connecting the whole of the continent, many vast and beautiful areas remain without power.
A. refinement
B. expansion
C. ubiquity
D. augmentation
E. omnipresence
F. isolation

选项

答案B,D

解析 逻辑连接词是made,表示因果,前后同义对应。一个世纪以来的________使得电网成为连接大陆的all-encompassing web(无所不包的网络),空格与all-encompassing同义对应,B项expansion(扩张)和D项augmentation(增加)符合。容易误选C、E。注意空格前有a century of修饰,是持续动作,“经过一个世纪的扩张”比“经过一个世纪的无处不在”更合适。再者,如果无处不在了,为何有的地方remain without power?
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