在2020年考研英语二中，考生们普遍遇到了丰富的词汇量和复杂句型。以下是对部分题目的答案详解：
阅读理解A：
1. 首段末句提到“a great many of the young people who left the villages to seek a job in the cities”，这里“a great many of”表示“很多”，故选C。
2. 根据第三段末句，可知B选项“工作机会”与原文相符。
3. 在第四段，作者提到“it is difficult to live on the money they earn”，故选A。
阅读理解B：
1. 根据第二段第二句，可知作者认为“the traditional ways of teaching and learning at school”存在问题，故选A。
2. 第三段提到“a lot of things that have been discovered have come about by mistake”，说明作者认为意外发现对科学的发展有很大贡献，故选B。
3. 第四段末句指出，尽管计算机有诸多优点，但“the danger of computers taking the place of humans in doing the work they do”仍然存在，故选C。
阅读理解C：
1. 根据第二段第一句，可知作者认为“the traditional school system”存在问题，故选B。
2. 在第三段，作者提到“the school is an environment which has a powerful influence on the children who grow up in it”，说明作者认为学校对儿童的影响很大，故选D。
3. 第四段提到“children are being educated in very different ways”，说明作者认为教育方式正在发生变化，故选C。
翻译：
1. 根据原文，可翻译为：“In recent years, many cities have been developing very rapidly, with skyscrapers, expressways, and modern shopping centers.”
2. 根据原文，可翻译为：“In order to keep the children from getting bored, teachers often use various teaching methods, such as games, songs, and pictures.”
3. 根据原文，可翻译为：“The government should provide more money for education so that more children can attend schools and receive a good education.”
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