69. Not only has the the by , it has led to the of spin-off like , , , and .【分析】本句为并列句。句子主干为Not only has the the , it has led to the 。not only but also 句型属并列结构长单句的分析，意为 不仅 而且 ，but also 可以省略。 not only 在句首，句子谓语要用部分倒装语序。【译文】公路系统不但通过提供运输路线影响美国经济的发展，还带动了一批诸如加油站、汽车旅馆、酒店、购物中心等相关行业的发展。70. An , on the other hand, has the home and faces an set of .【分析】 本句为简单句。句子主干为 has and faces 。on the other hand是插入结构，分隔了主语和谓语，意为 另一方面 。【译文】从另一方面来讲，一位受过教育的母亲，有更多在外赚钱的本事，并且能面对一系列完全不同的选择。71. His , to be at the on human- in , , in April, have .【分析】本句为简单句。句子主干为 have 。to be in April 是不定式短语作定语长单句的分析，修饰 。